electrical nightmare
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From: Ponte Vedra Beach Fl
electrical nightmare ok so i have a 99 frc the problems originally started with the pass window not goin down/up sometimes then it progressed to check tire press system, check traction, now ill be driving and the window will stop working, the door speaker will go out the the radio all my gauges and it'll pop up service tract, service tire press , low fuel, the security light comes on and reduced engine power. i checked cleaned and put dielectric grease on the to engine bay and the door jam grounds. it stopped for about a month, then started up again last night. any ideas sometimes when i hit bumps in the road everything will just go back to normal.
Last edited by Rob@EFIAlchemy; Dec 6, 2007 at 10:35 AM.
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Looks like your BCM (Body Control Module) is fried. Probably due to a clogged A/C drain. Is your floor board wet on the passenger side? If not, it still sounds exactly like the problem I had on my 2000 coupe. It's a common problem. The drain located under the battery, gets clogged and water goes right into the BCM through the firewall. You will need to take it to the dealer, or get online to gmpartsdirect.com and buy one.. The cost for a new BCM is about $300, plus you will need to have it programmed to your vin number. That will cost about $90. Do not buy a used one like I did at first, it will not work on your car until it is programmed to your vin. That assumes it is a good unit. The car will not start until it is programmed. Good Luck. Mike F.
PS It could also be a LDCM (Left Door Control Module), but I think it is the BCM that is the problem. It handles all the T/C and gages. When mine went bad, the hatch would pop open while I was driving, and the Traction Control would go on and off in rapid succession. This is an easy fix, if you know where to look. The BCM unit is located right under the passenger's side floorboard. There is a cover that has 2 latches to remove, and the BCM is the silver box inside the compartment under the floorboard. Look at it and see if you can see any water or moisture damage. Start there. Hope you solve this one!!!!!
PS It could also be a LDCM (Left Door Control Module), but I think it is the BCM that is the problem. It handles all the T/C and gages. When mine went bad, the hatch would pop open while I was driving, and the Traction Control would go on and off in rapid succession. This is an easy fix, if you know where to look. The BCM unit is located right under the passenger's side floorboard. There is a cover that has 2 latches to remove, and the BCM is the silver box inside the compartment under the floorboard. Look at it and see if you can see any water or moisture damage. Start there. Hope you solve this one!!!!!
Last edited by Mike F.; Dec 6, 2007 at 01:33 PM.
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From: Ponte Vedra Beach Fl
my car has had a water leak there before i fond paper work on a repair where the column lock module was water damaged which is right by the bcm, so ill look at that tonight. thanx
