My turn signals work, but my brake lights don't. I looked at the fuses, but they all look good. When I hit my brake, the door ajar light comes on in my cluster instead. Anyone know what might be causing it? My tails work, signals work, just having issues with the brake lights.
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The power flow for the brake lights goes like this: Fuse ->Brake switch -> Turn signal switch -> Rear lights. The only difference is, if you have a 3rd brake light in your rear window, that gets its power directly from the brake switch. It does not go thru the signal switch first. So, if you are having a brake light problem, and your fuses are good, check the 3rd light in the rear window, if it lights up (assuming the bulbs are good, no one ever changes them), then the problem is most likely in the turn signal switch, hope this helps!
There are TSB's for this issue. I chased this issue for months on mine. Go find the TSB's, there's troubleshooting pointing out the faulty part. It could be, the brake light switch, the hazzard light switch itself, the multi-function switch. I had replaced all of these and still had the problem. Wiring that goes from the brake switch to up near the fender was shorting against the fender. I replaced the pigtail, problem fixed. Best bet to help you, is find the TSB's for this problem.
No they are different systems going to the same place, the tail lights use one fillament in the bulb and the brake and turn signal use the other, a couple things to check, brake light fuse, brake switch (located on the brake peddle) check for power, I have also run into the 4 way flasher that were the problem, more than likely the brake switch