Charlie69 Posted October 17, 2017 Report Share Posted October 17, 2017 Oly pull the relay out and run a test wire from the (-) negative battery terminal. Take you multi-meter and check each connector for the relay for continuity with the negative terminal test wire. Note each color of wire that has continuity with the negative terminal. Next unplug the blue wire from the choke heater and test for continuity again noting any differences in color a of wire and continuity. I have a 84 720 FSM but it is loaned out. I will call the guy and tell him I need it back. 1 Quote Link to comment
wayno Posted October 17, 2017 Report Share Posted October 17, 2017 I suspect that the black wire with the red dots is a ground, both mine look the same(black/red dots) with both connected to an eye electrical fitting, I suspect if you put a timing light on both sets of spark plug wires and have at least the black/red dot wire not grounded, one of the coils will not be working, this happened on my 85 720 and I suspect the same thing would happen on the 86 in my driveway right now. The yellow wire should be tested the same way, if it is not grounded do both coils work? If you look on your front coil you will likely see that black/red dot wire connected to it, the back coil has much larger wires. Check the coils for that yellow wire also. 2 Quote Link to comment
720inOlyWa Posted October 18, 2017 Author Report Share Posted October 18, 2017 Oh man, thanks for the help. I will check this out. Gawd dang, Ratsun is great! I will try anything that is suggested, of course. One of them will be golden, I can just feel it. SO THANKS! 1 Quote Link to comment
Charlie69 Posted October 18, 2017 Report Share Posted October 18, 2017 If you have a wire showing continuity to the negative terminal that is not black that wire could be pinched or melted. 1 Quote Link to comment
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