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Wiring
Posted: Tue Mar 31, 2020 12:45 pm
by Diggertyree1965
Hi all I need help identifying a bcm problem or a wiring problem when I apply brakes dash lights come on and drivers side low beam head light comes on any ideas as it doing my head in
Re: Wiring
Posted: Tue Mar 31, 2020 5:08 pm
by delcowizzid
Single filament bulb in a 2 filament brake tail light holder or the earth on one of the brake/tail holders is bad
Re: Wiring
Posted: Tue Mar 31, 2020 6:14 pm
by Diggertyree1965
Thanks I will check that out
Re: Wiring
Posted: Mon Aug 24, 2020 6:28 pm
by Tufvk8
Diggertyree1965 wrote:Hi all I need help identifying a bcm problem or a wiring problem when I apply brakes dash lights come on and drivers side low beam head light comes on any ideas as it doing my head in
usually a negative somewhere.. just look and follow negative battery and further.. may help!
Re: Wiring
Posted: Tue Aug 25, 2020 5:52 am
by VK_3800
Something like that used to happen in certain VS Commodores when the electronic blower resistor module (i.e. for climate control models) died, the BCM didn't like it...! I believe pulling the right fuse to disable the blower was the fastest way to diagnose as everything else went back to normal. If its something else on the BCM bus the same troubleshooting might help narrow it down too.