[a1supersport]

There is a quick way to by-pass this problem. Find a 12-volt "switched" lead at the fuse box...preferrably one that's not being used, like an "ACC" (accessory) lead, and run a wire straight to the positive terminal on the coil. That'll make your coil "independent" again, and take the load off your electrical system (the lights and the wiring for it). From there the truck should run ok with the lights off, and the yellow wire shouldn't be warm. Yeah I know, it's a band-aid solution, but it'll save a lot of grief.