High volts

Ok look, you have to get this down to "the basics" and go from there.

1--There is SOME possibility that the battery itself could cause this, so try a known good battery out of another vehicle temporarily.

2--The regulator itself could be a problem, but you have replaced that.

3A--This leaves the sense voltage

3B--and the ground between the regulator and battery.

YOU MUST CHECK THESE in the following manner!!!



A---To check the sense voltage, Turn the key to run, but with engine OFF. Stab one probe of your meter into the battery POS post, and clip your other probe to as close to the regulator IGN terminal as you can get. Since you are having so much trouble, I'd be tempted to stick a pin through the blue regulator wire in an attempt to eliminate as much as possible.

Again, you want to see LESS than .2V, the less the better.

More voltage means you have a voltage drop problem in the harness. Your top suspects are the regulator connector, the bulkhead connector, the ammeter circuit, the ignition switch connector, and the switch itself. Also check the connections at the coil resistor. That is, the crimps in the connectors

B---To check the ground, get the engine running, the battery charged, and do the following check twice, first with everything in the car shut off (except the engine) and again with heater, lights, etc turned on.

Stab one probe of your meter onto the NEG. battery terminal, and stick the other probe directly onto the mounting flange of the regulator. You should read less than .2V (two tenths of a volt). More voltage means the regulator is not actually grounded to the battery NEG.