Mechanics

3400,V6 ENGINE,MY BCM KEEPS GOING OUT,WHAT WOULD MAKE IT GO OUT IN 5 MINUTES

2004 Oldsmobile Alero • 137 miles

I can replace the bcm, and go thru the process for the security light with the ign. Switch and it all sets up then after startin a time or two the bcm goes back like it was, all lights on dash and gauges come on for 3 seconds then go out and the tach and speedometer do not work. Can turn key on and jump across starter, it starts and runs and shifts fine, but no gauges or warning lights.
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Jmmjbn
October 12, 2012.



The drain on the bat. Is pulsing, I can take out the L/H bat 2 bec fuse from under the hood and it stops, what does that run or what might it be, I thank you for all you help


Tiny
Jmmjbn
Oct 15, 2012.
I found out itis on the ip/hvac fuse inside car, but dont know what that is and book does not say


Tiny
Jmmjbn
Oct 15, 2012.
Diagram shows the power distribution for the L/H bat 2 bec fuse and if the IPC/HVAC BATT fuse that is draining, disconnect the HVAC control assy to test if it is the one causing the problem or the IPC (instrument panel cluster)


KHLow2008
Oct 16, 2012.
What does HVAC stand for and where is it


Tiny
Jmmjbn
Oct 16, 2012.
Heating, Ventilation, Air Conditioning - that is the control panel for the A/C heater system.


KHLow2008
Oct 16, 2012.
Did you find anything out on your dilemma? I am having kinda the same issues, gauges drop to zero while driving, intermittently. Replaced the ignition switch, checked and verified every fuse while setting still and everything working fine. Scanner says no codes. Only seen it error while driving/moving. Above schematic will help, didn't think of HVAC module thrown into the mix.


Tiny
Gerginist
Nov 24, 2012.
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