00 regal 3.8, turn signals cause car to die

[veedubmechanic]

So this car is having electrical issues, lots.
The car came in and would not start, battery was dead put a new one in no crank. Tested power to the starter solenoid and motor, tapped on starter it started. Replaced the starter. Went to test drive car and the car dies when the turn signals are used (hazards are fine car does not die). Replaced the turn signal multifunction switch with a used one and car started. Died on test drive when turn signals used. Back in the shop I found the car had a remote starter installed. When you started the car with the remote start everything works fine, turn signals and all but you cant get the car to turn off with the key. So I removed the entire remote start system and now the car wont start. Wont come out of park unless the emergency button is pressed but the car has brake lights. I checked for power at the tranmission range switch at the transmission and it has power when cranked on the starter relay wire but no power at the solenoid wire when the car is cranked and its plugged in (sounds like a bad trans range switch on the transmission). My question is, why if anyone knows, would the turn signal switch cause the car to stall? I tried a used Body Module and nothing changed. When you turn the key on and press the turn signals all the dash lights go out. When the autostart was hooked up I checked for power at the body module for turn signals and it had power when the car was started with the autostart but no power when the car was started with the key??

Car is driving me crazy..! PM me if you have any help on this.

[BNaylor]

On the '97 - '04 Regal there are common issues with the multifunction switch and/or ignition switch causing a similar issue. So take your choice and good luck but I'd go with the ignition switch and harness assembly first. Also, we have old threads on the issue.

[veedubmechanic]

Originally Posted by BNaylor

I'd go with the ignition switch and harness assembly first. Also, we have old threads on the issue.

Thanks for the reply, I actually did a search after posting (dumb me) and found 5 posts on this in the past 6 months for the same issues. Google also had 5-10 finds on the EXACT issues and replacing the ignition switch fixed the issues.
I will attempt an ignition switch electrical portion replacement tomorrow hopefully.

[veedubmechanic]

Well I put a new ign switch electrical portion and the car runs like a champ no more electrical issues (odometer still doesn't work). I don't see how its related to the issues in an way (other than no start) but I guess it is. Also I disassembled the old switch and the contacts were very carboned up and wore down especially on the red power wire and black ground wire at the back ofthe switch.

[2000gpgtx]

Same issue is applicable to the W-car cousin of the Regal, the Grand Prix .. usually screws up auto-on headlamps and blower motor power feed. Believe the part # is the same between the two cars for the Ignition Switch assembly. I've replace four in the past month. Just an FYI addition to this thread for future reference, we'll be seeing many more as these chassis age.

[veedubmechanic]

I will keep in mind. I also believe the switch fits 00-03 monty carlo and impalla

[2000gpgtx]

Negs on the Bowtie W-Cars .. entirely different cylinder and switch set-up on the Chevrolet fraternal twins, they're dash mounted between the column and stereo.

[BNaylor]

Originally Posted by veedubmechanic

Well I put a new ign switch electrical portion and the car runs like a champ no more electrical issues (odometer still doesn't work).

Thanks for the feedback.

On the odometer display issue you can try removing the IP Cluster and touch up solder points or replace certain key resistors. Is this a LS or GS model?