Mechanics

ELECTRICAL GREMLIN

Oldsmobile Other

I have a 96 Oldsmoblie Cutlass Supreme SL 3.1L and it has a eletrical gremlin that happens once or twice a year only. The car was slightly flooded about 5 years ago, water covered the floor enough to short the ABS computer under the passanger seat out but this was replaced along with the padding under the carpet by insurance. What happens is the car will not start the fuel pump relay located on the passanger side front of the engine bay will not close, you can hear it opening and closing very quickly this might last a hour or a day then it would not do it again for along time. I have changed the relay at the time this was happening no luck new one did the same. Last year I lost all power car would not start changed battery still nothing then all of a sudden car worked no problems. The car quit on me once total power lose when I took of the parking brake (head lights come on) has not done since. For the last year I have noticed when ever use the brakes the headlights would shut off for a milli second now 2 days ago the car would not start no power, jumped car it started and ran but the rear defogger would not shut off pulled fuse but button light stayed on. Drove the car home and when I put the car in reverse lost all power unable to start. I disconected battery and checked with ohm meter battery fine. When I hooked battery back up car would not start and speedo spyked out to 120mph (car not running) and when I shut the key off ther was like a power spyke (door locks would operate loudly, interior lights would flash). I pulled the battery and put it on a battery tender and pulled all the fuse from the cabin fuse pannel I also pulled up the carpet to check the wireing harness on the passenger side to look for possible corrosion looks fine. Battery was out of car alnight, put battery back in and all fuses car starts runs fine but speedo is peged out at 120mph have not drove yet. Car is in awsome shape no rust it has 137K miles on it heck the exhuast is original this is the only issue with I am the second owner I got it in 99 with only 33K miles on it. I figure it is a Electrical issue harness, Computer not sure any ideas, Help would be welcomed. Thanks
Avatar
HDGP
January 3, 2007.




Well I had the battery checked it was fine check the wiring warness under the carpet and looked at the wires under the dash found nothing. Drove the car to work speedo still not working, get in car afterwork speedo works now WTF. Now the (Security) light is staying on someone mention the cruise, turn signal stack/swith on the column can cuase wierd problems anyone heard of this. What would make the security light stay on no alarmin car? Thanks

Tiny
HDGP
Jan 24, 2007.
Do a research on it-whether it has a BCM body control module. I'm begining to think! Of it due to all the weird things happening.

Rasmataz
Jan 26, 2007.
Thanks for your idea I did some checking through google found some other auto repair sites that mentioned the BCM and problems others expirenced. One problem mentioned that my car has is the HVAC system does not always function correctly it is always in window defrost mode no matter where the nob is set then all of a sudden it will work correctly and also my ignition key chimer chimes erraticly or not at all thinks I will check in to this more. Thanks once again.
AD

Tiny
HDGP
Jan 26, 2007.

AD