Jeep Wrangler Rear Defroster Not Working. Rear defroster on my TJ does not work. This is what I did to fix it this morning. Left rear turn signal and brake light dont work. So I grabbed my soldering iron flux a wire brush and solder and threw them in the Jeep.
As soon as I let go of the finger the light goes off. The next step then is Occams Razor. However what you are going to want to do is test for power and ground at the rear window. Broken rear U Joint - 1990 Jeep Wrangler. Rear defroster 2007 wrangler switch button lights but does not stay on. Look for the simplest things first.
TJ Wrangler Technical Forum.
Then the system stopped working. Hi the switch can still be bad even if the light comes on and the rear defroster does have a timer. The defroster vents for the passengerdiver windows work. In the wiring diagram above the Backlight-Electric Heated is the rear window defrost grid and you can see that it is NOT in the fused circuit of the heated mirrors. Defroster Coils not working. The next step then is Occams Razor.