Ronjon
Well-Known Member
Tonight my 72 Dart started overcharging when I took it for a short ride. The ammeter would peg when I stepped on the throttle, at idle it would be closer to center of the gage. The voltage regulator was smokin hot to the touch.
I read through some threads here and tested the alternator field terminals to the case. With both green and blue wires connected, both terminals had continuity to ground. When I removed the wires and rechecked, both terminals to ground were open, so I think that rules out the alternator.
I found that the blue wire when disconnected from the alternator had continuity to ground. I then disconnected the blue wire from the alternator, VR, ballast resistor and disconnected the electronic ignition box connector and the blue wire still has continuity to ground.
Looking at the factory wiring diagram I see that the blue wire goes to the ignition switch and 12v feed to the warning lights and gauges in the dash PCB.
I’m guessing I should disconnect the ign switch connector at the steering column and see which side is shorted? Looking for some troubleshooting guidance. Could it be a bad ignition switch or pcb? I did notice when I turned the car off and removed the key the brake light in the dash stayed lit, it would only go out when I disconnected the battery ground. Thx in advance for any insight.
I read through some threads here and tested the alternator field terminals to the case. With both green and blue wires connected, both terminals had continuity to ground. When I removed the wires and rechecked, both terminals to ground were open, so I think that rules out the alternator.
I found that the blue wire when disconnected from the alternator had continuity to ground. I then disconnected the blue wire from the alternator, VR, ballast resistor and disconnected the electronic ignition box connector and the blue wire still has continuity to ground.
Looking at the factory wiring diagram I see that the blue wire goes to the ignition switch and 12v feed to the warning lights and gauges in the dash PCB.
I’m guessing I should disconnect the ign switch connector at the steering column and see which side is shorted? Looking for some troubleshooting guidance. Could it be a bad ignition switch or pcb? I did notice when I turned the car off and removed the key the brake light in the dash stayed lit, it would only go out when I disconnected the battery ground. Thx in advance for any insight.