Once again the electrical gremlins are having a field day with my car. I went out the other night to a friends house for a party. Drove 45 minutes with no issues. Left about 5 hours later, it was 10 degrees out. Car starts and runs fine but i have some weird electrical issues now. When applying the brake, both the brake lights AND the left turn signal lights up, does not flicker like it was signaling but just illuminates the whole time i am applying the brakes. Even more odd is if i apply the brakes and signal left at the same time the signal is very rapid, and then slows down to normal as soon as i let off the brake. I've changed the bulb and the problem persists.

About 10 minutes into my drive the traction off light comes on. It cannot be turned back on with the button unless the car is turned off and then restarted, and then it still turns off about 5 minutes into my drive.

Also now my Homelink does not work at all. I tried reprogramming it but it seems like it isn't getting any power.

The only thing that has happened lately i can attribute this to is that we had a very severe weather change. Night before last it was 45 degrees and raining, and then in 4 hours it dropped to 10 degrees with gusts up to 50mph. Where do i start looking for the solution to this problem? can relays and fuses be affected by extreme cold?

Was on a bumpy road last night and noticed that also the power to the mirror was out but then when driving over a rough surface it came back and i regained everything. I looked over both labels on the fuse panels and am not sure what fuse or relay the Homelink, traction control button, and something related to the turn signals is on.

I can not find anything that shows a commonality between those systems. Have you checked and cleaned up power and ground connections?

As Archon mentions, there is limited commonality here. The only one point which is common (and only to the Homelink transmitter and some lighting) is Splice Pack 402. This is where both these circuits are grounded. SP402 (G402) is responsible for grounding the following:

L & R Vanity Mirrors
Universal Garage Door Opener
L & R Reading / Courtesy Lamps
Inside Rearview Mirror
Interior Lamp Switch
LEFT Tail/Stop, Marker, Backup, Signal & Turn Lamps
Rear Integration Module.

SP402 is located on the left side of the trunk, behind the trim panel just in front of the left tail lamp assembly. A splice pack (in this particular case) looks like a small black module with several wires entering the bottom. They will be black wires or black wires with a white stripe. There is a bolt through a tab on the top which secures it to the body of the vehicle. There will also be a gray piece of plastic (secondary lock mechnism) around the bottom where the wires entrer.

That splice pack sounds worth investigating. Everything is fine today so far. I had a couple cases of beer in back that were moving around a little so perhaps they bumped something but i doubt it. Probably just a coincidence.

I have checked the power and ground cables religiously due to my other electrical issue.

What is the rear integration module responsible for?

The RIM is one of 3 body control modules present on the 2K+ Bonneville. It manages several functions, some of which include:

Automatic level control
Rear defrost (partial)
Some interior lighting control
Control of the fuel door lock
Trunk release
Accessory inflator option
Power moding (partial) relating to heated seats

Ok. I'll have to check that out when i get off work and then go from there. Thanks for all the information!

Checked it out today. The splice pack you described was partially unplugged. was a 2 minute fix including pulling the trim piece and now everything is back to normal. Thanks alot!

Well done, and a big pat on the back for everyone here. Beers all around. (Darcy will pick up the tab).

Glad everything worked out for you