kttate75
NAXJA Forum User
- Location
- Boulder, CO
96 XJ Sport 4.0
Last night the GEN light came on and gauge started dropping. I immediately thought the alternator was going out (reman alt I put in about 3 years ago - battery is an interstate about 2 years old). This morning I tested at the battery and got 12 volts, started it and got 12 volts again. I drove to the parts store, GEN light came on and gauge started dropping again. Then, as I pulled into the parking lot the gauge shot up to about 15. Parked it and had the parts guy test it, read 13.2 volts at idle and 13.5 under load. Driving home, GEN light came on and gauge starts dropping. Turned on the heater and headlights, gauge dropped a little then shot up again. Parked and left it idling and gauge started dropping again a minute later. Just tested at battery and got 12 volts running and after shutting it off. Any insight is appreciated, thanks.
Last night the GEN light came on and gauge started dropping. I immediately thought the alternator was going out (reman alt I put in about 3 years ago - battery is an interstate about 2 years old). This morning I tested at the battery and got 12 volts, started it and got 12 volts again. I drove to the parts store, GEN light came on and gauge started dropping again. Then, as I pulled into the parking lot the gauge shot up to about 15. Parked it and had the parts guy test it, read 13.2 volts at idle and 13.5 under load. Driving home, GEN light came on and gauge starts dropping. Turned on the heater and headlights, gauge dropped a little then shot up again. Parked and left it idling and gauge started dropping again a minute later. Just tested at battery and got 12 volts running and after shutting it off. Any insight is appreciated, thanks.