Disconnect the orange/black wire going to the radio. That is the only wire that is connected between the light circuit and the radio.
A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
New headlight switch $23. Having turn signals that work, priceless.
So that was it, just a headlight switch caused those problems? I am having a similar issue, and don't even know where to start. Not sure if it is a ground issue, a short, or a switch. Without going into any detail, somehow, my brake lights, front marker lights, dash lights, and turn signals are all working in tandem. How are all these things connected? I hope it is just a switch.....
Check all the bulbs too I just went through a similar situation with my other car where one filiment was broken and touching the other in the bulb causing all kinds of wierd backfeeding problems for months. Abs light and airbag lights were popping on so I was thinking clockspring, cv shafts, unit bearings type stuff all over a 59 cent bulb.