Bulb in dash is good.
If I switch the bulb to another socket it works.
The battery is grounded to the engine block and there is a ground strap to the chassis. Running another ground from the battery to the chassis with a good connection did not change anything.
The front light gets power, but only to the running light circuit, the turn signal circuit is not getting power.
The turn signal switch is new. When putting a test light to the connection on the turn signal switch the test light will flash like a turn signal should so that has been eliminated as the issue.
Both rear lamps have running lights and turn signals. But the brake light only illuminates on the left side and only with the left turn signal on. This will also work with the key in the off position and the turn signal switch not getting power.
I can see the entire wiring harness and there is no rodent damage. Some of the harness is wrapped, but I do not want to start pulling it completely apart without knowing what I am doing first.
I have wiring harness diagrams, they do not help tell me what circuit is creating this issue. I believe this situation requires someone with excellent knowledge of electricity and how circuits work.
Something in the circuit is causing this issue and I am looking for help for the things I have not done yet, so here is my list:
Replaced: Flasher relay, turn signal switch 30 feet of bad wiring in the bed area, all the bulbs, 3 sockets, 4 lamp assemblies, head light switch, all fuses, battery cables, added a ground strap from the engine to the chassis.
My original problem was that I had no running lights, no turn signals, no dash lights, only head lamps and left rear brake light with turn signal engaged.
Doing the above repair/repalcements corrected everything except brake light and turn signal issue as stated above.
Sunday, March 2nd, 2014 AT 9:42 AM