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Discussion Starter · #1 ·
2008 Solstice right rear brake and turn signal is not working and the front right turn flashes fast. The RR bulb is good, and I also tried a new one just to confirm it. I also tested the contacts and the wires to the bulb socket with a test light and there is not any flashing 12v. on the black wire that runs the turn and brake filament of the bulb, so I know it is not a bad bulb or socket contact. From what I can tell, the turn and brake feed comes from the BCM, so can anyone tell me if there are any known common problems with this? If not, any suggestions? The car has never been wrecked so there shouldn't be any wiring that has been repaired or damaged.

Thanks,
Jeff
 

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The fast flash on the front indicates an open circuit at the rear. The BCM does drive the lights. Test the socket by going direct to a good ground and putting the plus probe on the plus terminal to verify the issue is not a bad ground. Then start tracing the wire pair back to the BCM. I would pull up the right footwell carpet and inspect the terminals at the BCM too.
 

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Yes what Rob said, and I also remember some threads about a bit of corrosion on the backside of or within a BCM. Someone was having weird electrical problems but with some cleaning of a bunch of contacts of the plug or the BCM itself things were rectified. This would be an end of analysis scenario though.


Sent from AutoGuide.com App
 

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Discussion Starter · #4 ·
Thanks for the replies and suggestions. I agree that the fast flash is typically a bad bulb or open circuit on the other end of the car but I wanted to make sure that it was the feed from the BCM and not the turn signal switch or flasher unit. Where can I get a wiring diagram of the BCM so I know what pin the right turn signal comes off of? Then I can start to trace it.

Thanks, Jeff
 

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Discussion Starter · #5 ·
I fixed the brake/turn light problem and I am officially an IDIOT. I actually had two problems that I ASSUMED were okay. The first was that my MAC test light has a connection issue where the wire goes into the handle and when I was testing the circuit it was fine when I checked the parking light wire but must have lost connection when I moved it to the brake/turn wire and terminals so it looked like there was no power from the BCM. Today I checked it with a volt meter and the circuit was fine with flashing voltage. The second problem was that I had a bad bulb out of the package. I put the other bulb from the package in it and it works fine.

The moral of the story is never ASSUME anything and always double check everything. I assumed my test light was good and also that the 3157 bulb was good out of the package. So thank you to Rob the Elder and Godrod for allowing me to waste your time.

Jeff
 

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As for wiring diagrams, go to Autozone.com and get a (free) login. Plug in your car and go to the maintenance pages, you'll find the schematics there.
 

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I fixed the brake/turn light problem and I am officially an IDIOT. I actually had two problems that I ASSUMED were okay. The first was that my MAC test light has a connection issue where the wire goes into the handle and when I was testing the circuit it was fine when I checked the parking light wire but must have lost connection when I moved it to the brake/turn wire and terminals so it looked like there was no power from the BCM. Today I checked it with a volt meter and the circuit was fine with flashing voltage. The second problem was that I had a bad bulb out of the package. I put the other bulb from the package in it and it works fine.

The moral of the story is never ASSUME anything and always double check everything. I assumed my test light was good and also that the 3157 bulb was good out of the package. So thank you to Rob the Elder and Godrod for allowing me to waste your time.

Jeff
Do not feel bad, this has happened to me on many occasions. I finally tried to adopt the approach that when I can not figure out somthing, start with the simple things and verify them first.

Glad you got it fixed.
 

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yeah, I had problems with a couple test lights in the past so I break out my cheap multimeter whenever I need to check something. Glad you got it fixed. as for the bulbs, I'm bet there is a hecho in mexico on there somewhere:)
 
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