73desertstorm
Junior Member
- Joined
- Aug 31, 2022
- Posts
- 2
- Reaction score
- 0
- Location
- waxahachie
- First Name
- james
- Truck Year
- 1973
- Truck Model
- 2500
- Engine Size
- 454
Got the standard 3 wire alternator and I am flabbergasted. The excitor wire has the required 12 volts when the wire is unplugged from the alternator. When I plug the excitor wire into the alternator, the bolts drop to 2.5 which obviously doesn’t start the alternator. What causes the the volts to drop when the excitor is plugged into the alternator?
Got a 73 gmc 2500 454.
Got a 73 gmc 2500 454.
