Headlight indicator turning on when breaking.

[Tbay LX]

Sooooo... when in auto mode, my headlight indicator is turning on, the dash is dimming, etc. whenever I hit the breaks. Also, the parking/corner lights are going on and off. Weird, eh? Any ideas? Oh, and Merry Christmas!

 

[Tbay LX]

So, just an update. I think I've traced the issue to the stop light circuit, as removing that fuse causes the problem to go away. I've pulled all the break light bulbs one at a time, and that has made no difference though. any ideas where to look next? Also, I had the breaks done the week before this issue began: front pads, back pads and rotors. I don't see why they would have touched anything electrical while doing the breaks, but it does seem like a bit of a coincidence.

 

[Keowee]

Have you had any trailer wiring done recently?

 

[Tbay LX]

No, but there is trailer wiring that I've never used. How would I test that? If I disconnect the box that's behind the rear driver's side panel, does that effectively remove the circuit? I was a little nervous, because that box says something about high power, or high capacity or something a bit frightening sounding. Electrical is not my friend.

 

[Keowee]

Just a guess if someone had made any changes in the wiring. The conversion box is known for going bad but would only cause the trailer lights to not work.

 

[Tbay LX]

Hmmm... I can't seem to locate a fuse for the trailer wiring. If I disconnect the conversion box, would that basically do the same thing as removing the fuse, if there were one?

 

[Keowee]

I doubt that the box would be causing the problem since no aftermarket wiring has been done. Something else going on.

 

[Tbay LX]

Just couldn't be that easy, eh? Well, thanks for the info.

 

[Tbay LX]

Update: We had a big thaw today, with the weather getting above freezing for the first time since this issue crept up. Mysteriously, the problem seams to have solved itself, for now at least. I'm thinking there must have been some ice shorting out a connection somewhere, probably somewhere along the trailer hookup wiring. Not sure if that makes sense though.