Cranks but won't start. Unplug ground at field spade on Alternator and it starts?

67Dart273 said

Progress however slight. Don't forget that drop (and it can come and go) can be right in the contacts of any switch. Part of why relays are useful

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I been reading up on relay mod. Its much more precise if VR gets its voltage straight from battery via relay vs a maze of connections/switches/hops.

Prior to me cleaning all the connections I measured .4 volt drop between VR Ign 2 wire and battery when engine was running. Even if every connection is perfect there will always be some drop because of the many hops connections maze the current has to travel with the original circuits.