To read the voltage at the wire, one lead is attached to the wire, and the other lead to a ground. If you attach one lead to one end of the wire, and the other lead to another end of the wire, you are reading voltage drop. Less than 1V is normal.Originally posted by pop d top:
There is a full 12V at the wire I had previously run when the ignition switch is in run. If I have my Voltmeter on the wire then "touch" the wire to the BATT terminal in the cap...voltage drops to less than a volt (I don't know if that's significant or a red herring).
You may have a bad connection at the bulkhead connector on the firewall. Loosen the bolt in the connector & pull it apart and look for corrosion on the terminals, clean them up and put the connector back together & see what you get.