{"id":7543,"date":"2026-06-09T04:53:05","date_gmt":"2026-06-09T04:53:05","guid":{"rendered":"http:\/\/australianholden.com\/?p=7543"},"modified":"2026-06-21T03:27:15","modified_gmt":"2026-06-21T03:27:15","slug":"vt-vx-bcm-fault-guide","status":"publish","type":"post","link":"https:\/\/australianholden.com\/index.php\/2026\/06\/09\/vt-vx-bcm-fault-guide\/","title":{"rendered":"VT, VX BCM Fault Guide"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The Body Control Module (BCM) is one of the most important electronic components in the VT and VX Commodore. Acting as the vehicle&#8217;s central body electronics controller, the BCM manages everything from central locking and interior lighting to the security system, keyless entry, and communication between various vehicle modules.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As VT and VX Commodores continue to age, BCM-related faults are becoming increasingly common. Because the BCM controls so many systems, a single fault can create multiple electrical problems that may appear unrelated.<\/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;BCM<\/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 : \"BCM\",\nfu_ebay_query : \"VT VX Commodore BCM\",\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\">What Does the BCM Do?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The BCM acts as the central controller for many non-engine electrical functions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">BCM Responsibilities<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Security and immobiliser operation<\/li>\n\n\n\n<li>Central locking<\/li>\n\n\n\n<li>Remote keyless entry<\/li>\n\n\n\n<li>Interior lighting<\/li>\n\n\n\n<li>Courtesy lights<\/li>\n\n\n\n<li>Power window control<\/li>\n\n\n\n<li>Warning chimes<\/li>\n\n\n\n<li>Communication with other modules<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">When the BCM develops a fault, multiple systems can be affected simultaneously.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Why BCM Problems Occur<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Most BCM failures are caused by age and electrical wear.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Internal circuit board deterioration<\/li>\n\n\n\n<li>Moisture intrusion<\/li>\n\n\n\n<li>Corroded connectors<\/li>\n\n\n\n<li>Voltage spikes<\/li>\n\n\n\n<li>Poor earth connections<\/li>\n\n\n\n<li>Wiring faults<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many original BCM units are now more than two decades old.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Common BCM Fault Symptoms<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Warning Signs<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No-start conditions<\/li>\n\n\n\n<li>Security light remaining on<\/li>\n\n\n\n<li>Central locking failure<\/li>\n\n\n\n<li>Battery drain<\/li>\n\n\n\n<li>Interior light faults<\/li>\n\n\n\n<li>Power window issues<\/li>\n\n\n\n<li>Remote key problems<\/li>\n\n\n\n<li>Random electrical behaviour<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Multiple electrical faults occurring together often point towards BCM involvement.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">1. Immobiliser No-Start Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most common BCM-related complaints.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Engine cranks but won&#8217;t start<\/li>\n\n\n\n<li>Security light stays illuminated<\/li>\n\n\n\n<li>Intermittent starting problems<\/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>BCM communication failure<\/li>\n\n\n\n<li>Immobiliser faults<\/li>\n\n\n\n<li>Security system issues<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The BCM plays a critical role in authorising engine startup.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Typical Repair<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check key operation<\/li>\n\n\n\n<li>Verify BCM communication<\/li>\n\n\n\n<li>Inspect immobiliser circuits<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">2. Central Locking Failure<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A very common VT and VX issue.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Doors won&#8217;t lock<\/li>\n\n\n\n<li>Doors won&#8217;t unlock<\/li>\n\n\n\n<li>Remote locking stops 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>BCM output failure<\/li>\n\n\n\n<li>Faulty door actuators<\/li>\n\n\n\n<li>Wiring faults<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Typical Repair<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Always test actuators before replacing the BCM.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">3. Remote Keyless Entry Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Common on ageing vehicles.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Remote stops functioning<\/li>\n\n\n\n<li>Intermittent operation<\/li>\n\n\n\n<li>Reduced operating range<\/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>BCM receiver fault<\/li>\n\n\n\n<li>Key transmitter issues<\/li>\n\n\n\n<li>Wiring problems<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">4. Battery Drain Issues<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A failing BCM can create parasitic battery drain.<\/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 overnight<\/li>\n\n\n\n<li>Battery repeatedly discharged<\/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>BCM failing to enter sleep mode<\/li>\n\n\n\n<li>Internal module faults<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Typical Repair<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Parasitic draw testing is often required.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">5. Interior Light Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The BCM controls various interior lighting functions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Interior lights remain on<\/li>\n\n\n\n<li>Lights don&#8217;t operate<\/li>\n\n\n\n<li>Delayed switching issues<\/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>BCM failure<\/li>\n\n\n\n<li>Door switch faults<\/li>\n\n\n\n<li>Wiring issues<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">6. Power Window Faults<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many VT and VX window functions involve BCM control.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Windows stop working<\/li>\n\n\n\n<li>Intermittent operation<\/li>\n\n\n\n<li>Multiple windows affected<\/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>BCM output issues<\/li>\n\n\n\n<li>Wiring faults<\/li>\n\n\n\n<li>Switch problems<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">7. Random Alarm Activation<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A frustrating issue experienced by many owners.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Alarm sounds unexpectedly<\/li>\n\n\n\n<li>Security system behaves erratically<\/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>BCM faults<\/li>\n\n\n\n<li>Door switch problems<\/li>\n\n\n\n<li>Wiring issues<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">8. Warning Chime Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The BCM controls various audible warning functions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No warning chime<\/li>\n\n\n\n<li>Constant chime<\/li>\n\n\n\n<li>Incorrect warnings<\/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 BCM faults<\/li>\n\n\n\n<li>Communication issues<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">9. Intermittent Electrical Glitches<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most difficult problems to diagnose.<\/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>Multiple systems affected<\/li>\n\n\n\n<li>Inconsistent 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>Internal BCM deterioration<\/li>\n\n\n\n<li>Connector corrosion<\/li>\n\n\n\n<li>Earth faults<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">10. Security Light Staying On<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A common early indicator of BCM issues.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Security lamp illuminated<\/li>\n\n\n\n<li>Starting concerns<\/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>BCM communication problems<\/li>\n\n\n\n<li>Immobiliser faults<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Common BCM Connector Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many BCM issues originate from connector faults rather than the module itself.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Inspect For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Corrosion<\/li>\n\n\n\n<li>Moisture<\/li>\n\n\n\n<li>Loose terminals<\/li>\n\n\n\n<li>Damaged wiring<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Connector problems often mimic BCM failure.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">BCM Location<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">In VT and VX Commodores, the BCM is located beneath the dashboard area.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Inspection Areas<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>BCM housing<\/li>\n\n\n\n<li>Wiring harnesses<\/li>\n\n\n\n<li>Electrical connectors<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Careful inspection can reveal moisture damage or corrosion.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">How to Diagnose BCM Problems<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">Step 1: Check Battery Voltage<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Low voltage can create BCM-related symptoms.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Verify<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Battery condition<\/li>\n\n\n\n<li>Charging system performance<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Step 2: Inspect BCM Connectors<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Look for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Corrosion<\/li>\n\n\n\n<li>Water damage<\/li>\n\n\n\n<li>Loose terminals<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Step 3: Check Earth Connections<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Poor grounds can cause BCM communication faults.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Step 4: Scan for Fault Codes<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A suitable scan tool can identify communication errors.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Step 5: Test Related Components<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Before condemning the BCM, test:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Door actuators<\/li>\n\n\n\n<li>Window switches<\/li>\n\n\n\n<li>Relays<\/li>\n\n\n\n<li>Wiring<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Common Misdiagnoses<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">Faulty Door Actuators<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Often mistaken for BCM failure.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Weak Batteries<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Can create multiple BCM-like symptoms.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Poor Earth Connections<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A major cause of electrical faults.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Wiring Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Can mimic BCM failure.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">BCM Replacement Considerations<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Replacing a BCM is not always straightforward.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Important Factors<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Security system matching<\/li>\n\n\n\n<li>Immobiliser compatibility<\/li>\n\n\n\n<li>Key programming<\/li>\n\n\n\n<li>Vehicle configuration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Incorrect BCM replacement can create additional problems.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Repair vs Replacement<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">BCM Repair<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Retains original unit<\/li>\n\n\n\n<li>May be less expensive<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Disadvantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Not all faults are repairable<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">BCM Replacement<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Permanent solution for severe faults<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Disadvantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Programming may be required<\/li>\n\n\n\n<li>Matching issues can occur<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Preventing BCM Problems<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Maintain Battery Health<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Protects sensitive electronics.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Repair Water Leaks Promptly<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Moisture is a major cause of BCM failure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Maintain Earth Connections<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Improves electrical reliability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Address Electrical Faults Early<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Small issues can develop into larger problems.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Warning Signs of Imminent BCM Failure<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increasing electrical glitches<\/li>\n\n\n\n<li>Frequent battery drain<\/li>\n\n\n\n<li>Intermittent no-start conditions<\/li>\n\n\n\n<li>Security system problems<\/li>\n\n\n\n<li>Multiple electrical faults occurring together<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Early diagnosis often prevents complete failure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The BCM is at the heart of the VT and VX Commodore&#8217;s electrical system and controls many of the vehicle&#8217;s most important convenience and security functions. As these vehicles age, BCM-related faults are becoming more common due to internal electronic wear, connector corrosion, wiring deterioration, and moisture damage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because BCM failures can mimic numerous other electrical problems, careful diagnosis is essential before replacing components. In many cases, poor earths, damaged wiring, or faulty accessories are the real cause of the issue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With proper diagnosis and repair, most BCM-related faults can be resolved, helping keep VT and VX Commodores reliable and enjoyable to own for many years to come.<\/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\/09\/vt-vx-commodore-electrical-problems\/\" type=\"post\" id=\"7541\">VT, VX Commodore Electrical Problems<\/a><\/li>\n\n\n\n<li>Best Scan Tools for Holden Owners<\/li>\n\n\n\n<li><a href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/09\/common-ecotec-engine-problems\/\" type=\"post\" id=\"7518\">Common Ecotec Engine Problems<\/a><\/li>\n\n\n\n<li>How to Inspect a VT or VX Commodore Before Buying<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Body Control Module (BCM) is one of the most important electronic components in the VT and VX Commodore. Acting as the vehicle&#8217;s central body electronics controller, the BCM manages everything from central locking and interior lighting to the security system, keyless entry, and communication between various vehicle modules. As VT and VX Commodores continue [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3460,"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-7543","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>VT, VX BCM Fault Guide - Australian Holden<\/title>\n<meta name=\"description\" content=\"The Body Control Module (BCM) is one of the most important electronic components in the VT and VX Commodore\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/09\/vt-vx-bcm-fault-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"VT, VX BCM Fault Guide - 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