I've got a 77 CJ-7 ,258 , 3 speed, just got through putting it back together with all new lights and now I have a very different problem. All the lights work, but the left turn signal will not work if the headlights are on, the right one works with the headlights on or off, and the left works if the headlights are off, but if you turn them on the left side stops. All other lights are working fine, just that one issue. Any suggestions?
I had a very similar problem that I chased for a month. I tried a new turn signal switch, new ground, you name it, I tried it?
I found my answer in the bulkhead connector at the firewall. The previous owner didn't install the connector properly by failing to provide an adequate sized hole in the fiberglass fire wall. Therefore, the connector was drawn tite with the center bolt only partially. So when I wiggled the connector I could run my headlights and the turnsignals simultaneously. I had to make the firewall opening slightly larger to make sure that both halves of the bulkhead connector would engage fully. This cured my problem.
I've noticed that PO's can be a real pain in the butt. My PO simply ran new single wires to toggle switches implanted at various locations on the dash. Its like turning on the old family mixer anytime you want see at night. And my blinkers have the same problem. Im gonna pull the firewall connector and clean/inspect it real good. Maybe I can revive some of these dead lights.
before i went into the column on mine and replaced a damaged turn signal cam,i 'd only get one blinker on and only when i hit the brakes, even the front turn signal would light along with the back. i had a problem with the lights extinguishing when i depressed the foot bright light switch, rewired it, then found a broken wire at the left front light. i would look at the grounds at all your front lights. i believe the PO was using this CJ to grow rust, i had to go through every ground and clean them and get good connections for every light, guage, indicator, etc. john strenk's posts are invaluable, you should check them out
the po on my jeep made a real mess of the wiring. i have no idea what they did. turn signals are wonky. Only have high beams, no low beams. Have a slow draw on the battery somewhere, so they installed a battery kill switch. There's a random toggle switch for the headlights that kill the headlights...inside the engine compartment. Why? I have no idea. Strangest place I've ever seen for a switch.
I'm going to check the grounds Tues. AM. I should have added that the left turn signal that doesn't work with the headlights on is lite up like it's on but not blinking on front and rear.. I'm going to run a ground wire from the firewall ground (battery) to the ground lug behind the headlight and see what I get (the turn signals use the same ground I think). I will also do the same to the taillight if the front light doesn't change what it's doing. Then I will post with results or more questions...