As I suspected, with the two voltage readings, a poor regulator ground. Just not at the firewall. I agree with Supercuda, run a temporary ground between the body and engine and see what you get. One lead of a pair of jumper cables works great for this.

Last edited by 6PakBee; 07/04/15 10:26 AM.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".