{"id":7368,"date":"2026-06-16T05:21:59","date_gmt":"2026-06-16T05:21:59","guid":{"rendered":"http:\/\/australianholden.com\/?p=7368"},"modified":"2026-06-21T11:39:23","modified_gmt":"2026-06-21T11:39:23","slug":"early-commodore-electrical-problems","status":"publish","type":"post","link":"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/early-commodore-electrical-problems\/","title":{"rendered":"Early Commodore Electrical Problems"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Electrical problems are among the most common issues affecting early Commodores today. Whether you own a VB, VC, VH or VK Commodore, age, corrosion and decades of repairs can create a variety of frustrating electrical faults.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike engine or suspension issues, electrical problems are often intermittent. A Commodore may start perfectly one day and refuse to start the next. Headlights may flicker, gauges may stop working, or the battery may mysteriously go flat overnight.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The good news is that most electrical faults in early Commodores are well understood and usually caused by ageing components rather than major wiring failures. With systematic diagnosis and preventative maintenance, many problems can be identified and repaired relatively easily.<\/p>\n\n\n<div id=\"fu_ebay_0\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 0 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_0\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Electrical<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_0 = null;\nvar waitForDepends_fu_ebay_0 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_0);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_0 = jQuery(\"#fu_ebay_0\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Electrical\",\nfu_ebay_query : \"VC Commodore electrical\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 0,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_0.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Why Early Commodores Develop Electrical Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">VB, VC, VH and VK Commodores are now over 35 to 45 years old.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Corroded terminals<\/li>\n\n\n\n<li>Worn wiring<\/li>\n\n\n\n<li>Faulty earth connections<\/li>\n\n\n\n<li>Ageing switches<\/li>\n\n\n\n<li>Alternator wear<\/li>\n\n\n\n<li>Previous owner modifications<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Most faults are related to age rather than poor design.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Battery Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The battery is often the first component blamed when electrical issues occur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Slow cranking<\/li>\n\n\n\n<li>No crank condition<\/li>\n\n\n\n<li>Dim headlights<\/li>\n\n\n\n<li>Intermittent starting<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Possible Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Weak battery<\/li>\n\n\n\n<li>Poor battery connections<\/li>\n\n\n\n<li>Charging system faults<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Always test the battery before replacing other components.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Corroded Battery Terminals<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">One of the simplest and most common faults.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Slow starting<\/li>\n\n\n\n<li>Voltage drop<\/li>\n\n\n\n<li>Intermittent electrical issues<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Signs<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>White or green corrosion<\/li>\n\n\n\n<li>Loose terminals<\/li>\n\n\n\n<li>Damaged battery cables<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Cleaning terminals often restores proper operation.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Battery Upgrade<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Century Ultra Hi Performance Battery<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Excellent cranking power<\/li>\n\n\n\n<li>Australian conditions suitability<\/li>\n\n\n\n<li>Reliable performance<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Six-cylinder Commodores<\/li>\n\n\n\n<li>Holden V8 Commodores<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_1\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 1 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_1\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Century Ultra Hi Performance Battery<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_1 = null;\nvar waitForDepends_fu_ebay_1 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_1);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_1 = jQuery(\"#fu_ebay_1\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Century Ultra Hi Performance Battery\",\nfu_ebay_query : \"Century Ultra Hi Performance Battery\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 1,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_1.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Alternator Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Alternators eventually wear out.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Battery warning light<\/li>\n\n\n\n<li>Flat battery<\/li>\n\n\n\n<li>Dim lights<\/li>\n\n\n\n<li>Charging voltage issues<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Common Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Worn brushes<\/li>\n\n\n\n<li>Internal regulator failure<\/li>\n\n\n\n<li>Bearing wear<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Alternator problems are extremely common in older Commodores.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Faulty Voltage Regulators<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Some charging issues originate from the voltage regulator.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Overcharging<\/li>\n\n\n\n<li>Undercharging<\/li>\n\n\n\n<li>Battery damage<\/li>\n\n\n\n<li>Electrical instability<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Warning Signs<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Excessively bright lights<\/li>\n\n\n\n<li>Boiling battery<\/li>\n\n\n\n<li>Low charging voltage<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A charging system test can quickly identify faults.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Charging System Tool<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Digital Multimeter<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Accurate voltage testing<\/li>\n\n\n\n<li>Charging system diagnosis<\/li>\n\n\n\n<li>Essential workshop tool<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Electrical troubleshooting<\/li>\n\n\n\n<li>Battery testing<\/li>\n\n\n\n<li>Alternator testing<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_2\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 2 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_2\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Digital Multimeter<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_2 = null;\nvar waitForDepends_fu_ebay_2 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_2);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_2 = jQuery(\"#fu_ebay_2\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Digital Multimeter\",\nfu_ebay_query : \"Digital Multimeter\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 2,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_2.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Bad Earth Connections<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Poor earthing causes countless electrical faults.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dim lights<\/li>\n\n\n\n<li>Intermittent accessories<\/li>\n\n\n\n<li>Starting problems<\/li>\n\n\n\n<li>Gauge issues<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Common Locations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Battery earth strap<\/li>\n\n\n\n<li>Engine earth strap<\/li>\n\n\n\n<li>Body earth points<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many strange electrical issues disappear after cleaning earth connections.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Headlight Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Headlights are a common source of complaints.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dim lights<\/li>\n\n\n\n<li>Flickering lights<\/li>\n\n\n\n<li>One light not working<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Corroded connectors<\/li>\n\n\n\n<li>Poor earths<\/li>\n\n\n\n<li>Faulty switches<\/li>\n\n\n\n<li>Worn wiring<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lighting performance often improves dramatically after electrical maintenance.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Indicator and Brake Light Faults<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Lighting circuits are particularly vulnerable to corrosion.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common Problems<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flashing indicators<\/li>\n\n\n\n<li>Non-working brake lights<\/li>\n\n\n\n<li>Intermittent operation<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Globe failure<\/li>\n\n\n\n<li>Corroded sockets<\/li>\n\n\n\n<li>Faulty switches<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Simple inspections often reveal the problem.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Fuse Box Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The fuse box is a common trouble spot in ageing Commodores.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Random electrical failures<\/li>\n\n\n\n<li>Intermittent operation<\/li>\n\n\n\n<li>Blown fuses<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Corrosion<\/li>\n\n\n\n<li>Loose terminals<\/li>\n\n\n\n<li>Age-related deterioration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Inspect the fuse box carefully during any electrical diagnosis.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Instrument Cluster Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Dashboard gauges often develop faults.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Inaccurate readings<\/li>\n\n\n\n<li>Non-working gauges<\/li>\n\n\n\n<li>Flickering illumination<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Voltage stabiliser faults<\/li>\n\n\n\n<li>Poor earths<\/li>\n\n\n\n<li>Circuit board deterioration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Instrument problems are especially common in higher-mileage vehicles.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Fuel Gauge Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A non-functioning fuel gauge is a frequent complaint.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gauge always empty<\/li>\n\n\n\n<li>Gauge always full<\/li>\n\n\n\n<li>Erratic readings<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sender unit wear<\/li>\n\n\n\n<li>Wiring faults<\/li>\n\n\n\n<li>Gauge failure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Testing both the sender and gauge is important.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Starter Motor Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Starter motors experience considerable wear over decades of use.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clicking noise<\/li>\n\n\n\n<li>Slow cranking<\/li>\n\n\n\n<li>No crank condition<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Common Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Worn brushes<\/li>\n\n\n\n<li>Solenoid failure<\/li>\n\n\n\n<li>Internal wear<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many starting problems are blamed on the battery when the starter is actually at fault.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Ignition Switch Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The ignition switch controls several important electrical circuits.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No start condition<\/li>\n\n\n\n<li>Intermittent accessories<\/li>\n\n\n\n<li>Loss of power<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Internal wear<\/li>\n\n\n\n<li>Electrical contact deterioration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Replacement is often straightforward.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Wiper Motor Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Windscreen wipers frequently develop faults.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Slow operation<\/li>\n\n\n\n<li>Intermittent operation<\/li>\n\n\n\n<li>Complete failure<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Motor wear<\/li>\n\n\n\n<li>Wiring faults<\/li>\n\n\n\n<li>Switch problems<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Older Commodores often suffer from reduced wiper performance.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Heater Fan Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The heater fan motor is another common failure point.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No fan operation<\/li>\n\n\n\n<li>Limited speed settings<\/li>\n\n\n\n<li>Noisy operation<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Common Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Motor wear<\/li>\n\n\n\n<li>Resistor failure<\/li>\n\n\n\n<li>Switch faults<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Fortunately, most repairs are relatively simple.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Aftermarket Wiring Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many early Commodores have been modified.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common Modifications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stereos<\/li>\n\n\n\n<li>Alarm systems<\/li>\n\n\n\n<li>Spotlights<\/li>\n\n\n\n<li>Electric fuel pumps<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Problems Created<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Poor connections<\/li>\n\n\n\n<li>Incorrect wiring<\/li>\n\n\n\n<li>Battery drain<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Always inspect non-factory wiring carefully.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Parasitic Battery Drain<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Some Commodores suffer from batteries going flat while parked.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flat battery after several days<\/li>\n\n\n\n<li>Constant battery replacement<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faulty accessories<\/li>\n\n\n\n<li>Wiring faults<\/li>\n\n\n\n<li>Stuck relays<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A multimeter can help identify current draw.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Diagnostic Tool<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Automotive Test Light Kit<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Quick fault finding<\/li>\n\n\n\n<li>Circuit testing<\/li>\n\n\n\n<li>Fuse testing<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DIY electrical repairs<\/li>\n\n\n\n<li>Troubleshooting<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_3\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 3 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_3\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Automotive Test Light Kit<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_3 = null;\nvar waitForDepends_fu_ebay_3 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_3);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_3 = jQuery(\"#fu_ebay_3\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Automotive Test Light Kit\",\nfu_ebay_query : \"Automotive Test Light Kit\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 3,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_3.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Common Electrical Maintenance Mistakes<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Ignoring Earth Connections<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Poor earths cause countless faults.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Replacing Parts Without Testing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Diagnosis should always come first.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Installing Cheap Electrical Components<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Quality parts generally last longer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Overlooking Corrosion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Corrosion remains one of the biggest causes of electrical problems.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Recommended Electrical Reliability Package<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">For most early Commodores:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Electrical Maintenance Package<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>New battery terminals<\/li>\n\n\n\n<li>Clean earth connections<\/li>\n\n\n\n<li>Charging system test<\/li>\n\n\n\n<li>Fuse box inspection<\/li>\n\n\n\n<li>Alternator inspection<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These simple checks prevent many common issues.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Are Early Commodore Electrical Systems Reliable?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Overall, yes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The electrical systems used in VB, VC, VH and VK Commodores were relatively simple and durable. Most faults encountered today result from age, corrosion and decades of use rather than fundamental design flaws.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With proper maintenance, these systems can remain reliable for many years.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical problems are an unavoidable part of classic Commodore ownership, but they are often easier to repair than many owners expect. Most issues can be traced to poor earth connections, charging system faults, worn switches or ageing wiring components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A systematic approach to diagnosis combined with basic maintenance can eliminate many common electrical gremlins and dramatically improve reliability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you&#8217;re maintaining a stock VB sedan, a VC SL\/E, a VH wagon or a VK V8, keeping the electrical system in good condition is essential to enjoying your classic Commodore with confidence.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Related Articles<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/early-commodore-starting-problems-guide\/\" type=\"post\" id=\"7370\">VB, VC and VH Commodore Starting Issues Guide<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/vb-vc-and-vh-commodore-transmission-problems\/\" type=\"post\" id=\"7358\">VB, VC and VH Commodore Transmission Problems<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/vb-vc-and-vh-commodore-suspension-problems\/\" type=\"post\" id=\"7362\">VB, VC and VH Commodore Suspension Problems<\/a><\/li>\n\n\n\n<li>Best Battery Upgrades for Classic Commodores<\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/16\/how-to-inspect-an-early-commodore-before-buying\/\" type=\"post\" id=\"7348\">How to Inspect an Early Commodore Before Buying<\/a><\/li>\n\n\n\n<li>Best Rust Prevention Products for Classic Commodores<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Electrical problems are among the most common issues affecting early Commodores today. Whether you own a VB, VC, VH or VK Commodore, age, corrosion and decades of repairs can create a variety of frustrating electrical faults. Unlike engine or suspension issues, electrical problems are often intermittent. A Commodore may start perfectly one day and refuse [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3469,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-7368","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Early Commodore Electrical Problems - 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