[Red Mustang Gt 46]

Another thing to check for is...rubber grommets that have worn away on the firewall/engine compartment exposing metal which may also wear away insulation on the portions of the wiring harness. just another thing to check for if you haven't fixed the "gremlin" yet...

Rubber grommets are often overlooked unless you've had a "gremlin" before...I went through hours on my old 1985 GT before I found the problem.