Originally Posted by machinehed

As an old wiring guy i can agree that sometimes " magic " happens with vehicle wiring . The problem with that is ... the original trouble will reoccure later .
The best way to find / solve a intermittent wiring problem is to go through your wiring system and clean / lube all connectors and wiggle test the wires for opens in the circuit. Pay special attension to the harness at the forks pivot point where the wires are bent each time you turn .
Body grounds are usually ok. if they are tight with no rust accumulation.
Check for good connections at ground busses.