RM21H9-SunfireYellow
383 4spd
Last night, after driving for about an hour, my ammeter gauge started acting erratically. For context:
About 20–30 minutes into the nighttime drive, the ammeter began jumping back and forth—then settled briefly—then started again. While this was happening, the instrument cluster lights flickered in sync with the gauge: dimming during discharge and brightening during charge.
I made it home and checked the wiring around the alternator and bulkhead. Everything looked okay, but clearly something’s off.
Any ideas on what could be causing this? I’d really appreciate any guidance or suggestions.
- I drove during daylight for an hour with no issues.
- Parked for about an hour.
- When I left, it was dark, so I turned on the headlights and drove off.
About 20–30 minutes into the nighttime drive, the ammeter began jumping back and forth—then settled briefly—then started again. While this was happening, the instrument cluster lights flickered in sync with the gauge: dimming during discharge and brightening during charge.
I made it home and checked the wiring around the alternator and bulkhead. Everything looked okay, but clearly something’s off.
Any ideas on what could be causing this? I’d really appreciate any guidance or suggestions.
