Leadfoot Posted July 16, 2009 Report Share Posted July 16, 2009 OK, I picked this up on another board I am on. I sent the guy this way, but wanted to go ahead and post it while he was trying to get registered etc. I am not too familiar with this particular model, but figured someone here might be. A friend has a 99 Buick Regal GS(?) Supercharged 3.8 It popped the PCM/BCM underhood relay fuse and wouldn't start, she also said it was making a clicking noise whilest running. Turns out that any time the key is put in the run position it engages the starter Starter relay checks out, as does all the wiring. I've traced the problem as something thats in the dash. I pulled the PCM and BCM (or what I believe to be those modules) and it didn't make any difference. I've got the steering column off anf I'm thinking it's a fault in the ignition switch. There are two modules listed that seem to be involved with the ignition switch. The switch itself and an ignition control module. ignition control module is under the dash, passenger side of the drivers footwell. Can anyone give me any more info on this thing, or has anyone experienced something similar in a GM automobile with this style ignition switch? It would be great if someone could tell me what wires to check for continuity to test the ignition switch, but all of the buick forums I went to are a little light on real tech info, and I can't find a decent wiring diagram, seems that 99 was a bit of a bastard year. All of the diagrams I can find are for 2000 and up. I really don't want to just start throwing parts at this thing, she doesn't have a ton of cash. Ignition switch was $90, control module was $135. Quote Link to comment Share on other sites More sharing options...
hotrodolds Posted July 16, 2009 Report Share Posted July 16, 2009 I doubt he pulled the PCM...car wont' run without it. It's underhood. Quote Link to comment Share on other sites More sharing options...
Regal_GS_1989 Posted July 16, 2009 Report Share Posted July 16, 2009 Just throwing it out there, but the car doesn't happen to have a remote starter by any chance does it? My Truck had an issue like that and it was caused by the remote starter being fucked. Pulled it out and everything has been great since. Quote Link to comment Share on other sites More sharing options...
Leadfoot Posted July 17, 2009 Author Report Share Posted July 17, 2009 I doubt he pulled the PCM...car wont' run without it. It's underhood. OK, his registration still hasn't been approved so he sent me a message on the other site...... If the PCM is underhood then I did not pull it then, I pulled the two modules under the dash, driver side of the footwell. They must be body control modules. No remote starter, car doesn't even have an aftermarket radio. It is 100% as GM built it. The only thing it's had done was a new fuel pump assy put in by me about 6 months ago. I think it's safe to say that's unrelated Quote Link to comment Share on other sites More sharing options...
nsjames Posted July 23, 2009 Report Share Posted July 23, 2009 OK, I finally got approved. Here's the rest of the story. She got impatient and went and bought a new ignition switch and ICM. Replaced the ignition switch and no change, start stays engaged. Replaced the ICM- Starter stays engaged. I know that something is triggering the starter relay, I verified the trigger signal with my multimeter. It is not a sticky solenoid in the starter, you can start the car and pull the starter relay and the starter disengages. So, what else can control the starter signal? Also a wiring diagram would be really helpful. Something else I thought of: If I unplug the ICM then the starter will not work at all. Quote Link to comment Share on other sites More sharing options...
slick Posted July 23, 2009 Report Share Posted July 23, 2009 Wait, so I'm reading this right: Popped the BCM/PCM fuse Replaced the fuse, check the relays, all good Put the key in the ignition, turn to on position, starter turns over, but will not stop once the car is started? At that point, I'd be looking at the BCM or the PCM. Without actually seeing a diagram of the starting circuit (I used to have the 99 model year stuff), it is really hard to say. You could try to trace each wire from the back of the starter relay back to where it go's, look for any shorts, cuts, frays, or bad grounds. Quote Link to comment Share on other sites More sharing options...
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