[kevins2]

When I assembled my car, not everything electrical worked initially. I discovered that within these wire harness plugs, not all the retaining tangs were set, meaning that the wire would be pushed backwards out of the connector when assembled. I found three wires that "clicked" into place when I pushed the wires in. It's possible that, in Moriarty's case, the connection worked initially but vibration and time has caused it to break connection, which could make the spark that was seen.

Regardless, I think it would be good advice for anyone building a car to take a couple minutes and push the wires into the connectors before assembly - easiest thing to do and it could avoid a lot of problems.

Kevin