74 Dart Wiring diagram
Charging system: These are fairly simple, basic diagram. This was envolved with a conversion so ignore where it says "existing wire." Basically, power from the key is fed to the "top of the point" of the VR connector, blue. The VR controls the "grounding" of the field of the alternator to control charge. That path for the field is from the key, to the field (blue) and through the field, and over to the VR (green) which controls ground
For a couple of quick checks, disconnect the green wire from the alternator and ground that alternator terminal with a jumper wire. Start and run the engine, slowly bring up RPM while monitoring battery voltage and while monitoring the ammeter in the car
Voltage should come up from 12-ish to 14 or more. Don't allow it over 16
If this happens the alternator is likely OK. Now check the green wire for continuity back to the VR connector, and......
Make ABSOLUTELY certain the VR is GROUNDED
Pull the VR connector, inspect for corrosion, and work connector in/ out several times to "scrub" the terminals. Then check that the blue wire for the VR plug has power
Charging system: These are fairly simple, basic diagram. This was envolved with a conversion so ignore where it says "existing wire." Basically, power from the key is fed to the "top of the point" of the VR connector, blue. The VR controls the "grounding" of the field of the alternator to control charge. That path for the field is from the key, to the field (blue) and through the field, and over to the VR (green) which controls ground
For a couple of quick checks, disconnect the green wire from the alternator and ground that alternator terminal with a jumper wire. Start and run the engine, slowly bring up RPM while monitoring battery voltage and while monitoring the ammeter in the car
Voltage should come up from 12-ish to 14 or more. Don't allow it over 16
If this happens the alternator is likely OK. Now check the green wire for continuity back to the VR connector, and......
Make ABSOLUTELY certain the VR is GROUNDED
Pull the VR connector, inspect for corrosion, and work connector in/ out several times to "scrub" the terminals. Then check that the blue wire for the VR plug has power
