My question is, of the 4 wires that come off of the factory tach ('85 CJ7 I6 258 auto)- 1 ground, 1 to the coil neg., 1 for the backlighting, what does the 4th go to?? It has a heavy 12 ga. red wire that was spliced into the ignition primary. I have no idea how I managed to do that. I found that some of my major headache with starting had to do with that 4th wire. I disconnected that wire and now she starts fine. The only diagram I can find is for a 4-cyl. CJ. Any ideas?
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