Don,t know about the tail light bit but the yellow wires i'm talking about go straight from the melted plug into the ignition sidecover on the engine.
I hooked a volt meter up to this plug after i renewed it and on all three wires it hovers around 4 volts while at idle untill the engine is reved then drops off to 0 volts.
I also hooked it to the battery and i seem to be getting charge. I also forgot to mention in my first post that i had just changed batteries, and wondering if this was the cause of the old battery dieing, especially since you mention that the blue wires come from the alternator.
