I recently noticed that my taillamps and my front corner lights don't light up anymore. Is it possibly the fuse? The front corner lights work, but only light up when I turn on my left/right signal. I don't know if it's related, but I recently installed a new head unit, and since then, I lost the A/C lights, and the transmission lights, but I still have my dash lights. Is something possibly wired incorrectly relating to the head unit? Has anyone had this problem?

 

do ur tails only turn on when u press on ur brakes or just don't turn on at all??
do all of ur dash lights turn on??

something tells me that it could be ur TCU (Timing Control Unit) but i may be wrong. the TCU is located under ur dash right behind the Anti-theft deterrant system box. its a white small box. just unplug it and pull out the small circuit board and there should be an area thats burned. if it is then just go to a local yard and pick one up for like $2-$5. so check that first but if ur havin' trouble locating it let me know and i'll explain it better.

 

My brake lights work fine, it's the tail lights at night that don't work. All of my dash lights are working, except A/C and the transmission lights.
Yesterday, I went to check if it was the fuse, and I noticed it was burnt, so I replaced it, but everytime I do, it just burns out again. Where exactly is the TCU? I'm having a little trouble finding it.

 

take off ur lower dash panel under ur steering wheel and ur gonna have ur fuse box, and other circuitry visible. once u have the lower dash panel taken off look for a bronze colored box that says Anti-Theft Deterrent System. once u located that box ur gonna c another small white box behind it. the small white box is ur TCU just unplug the harness and pull out the small circuit board out of the white box. all of this should be next to your fuse box on ur left hand side of the steering wheel.

Rick