Sunday, January 18, 2009

Re: [Classic Mustang] '67 lighting/electrical problem

       I had the exact same problem with my 65. When I disconnected the main harness at the firewall I found "green death" in all the connectors. I cleaned it up and for a while the problem was gone. It returned after a while but not to the same degree as before. I stripped back the insulation from the 10 gauge wire which goes from the positive post on the solenoid to feed the inside of the car and found oxidation on the wire. I could have replaced the wire by soldering in a new one but standard harnesses for the engine compartment are relatively inexpensive ($167 for the two large harnesses and the small one which connects the alternator to the main harness, from NPD) so I ordered new ones. Even if I would have replaced the corroded main feed wire I still would be dealing with stiff and brittle 44 year old wires and the chances are other wires throughout the engine compartment have corrosion also. The harnesses were recently ordered and the car is off the road for an engine rebuild and detailing so I can't yet tell you if it solved the problem but it's a sure bet corrosion should not be part of any electrical system. Start by disconnecting the harness at the firewall and see what's there.


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