After checking the alternator and the battery, you should have the problem found of why your battery indicator light keeps coming on and off while driving. Normally it is a failing alternator, but if it mainly happens when hitting bumps, then it could be as simple as loose wires.
If your car shuts off and the battery light comes on, it's likely that the alternator is not working properly. The alternator is responsible for charging the battery while the engine is running. If the alternator is not functioning correctly, the battery will eventually run out of power and the car will shut off. It's important to have this problem diagnosed and repaired as soon as possible.
It's possible your alternator is not outputting as much current as it should. This will NOT cause the battery light to illuminate with the ignition switch OFF, but may cause it illuminate when running--does your voltmeter show at least 12.4V when the truck is running (ideally it should be 13-14.5V when running just above idle or faster)
The battery light is driven by the regulator inside the alternator. If the regulator detects a problem, it will ground an output, causing the battery light to illuminate. If the light is on but dim, then there is a weak ground somewhere.
If the regulator detects a problem, it will ground an output, causing the battery light to illuminate. If the light is on but dim, then there is a weak ground somewhere. It could be the regulator, the wiring between the regulator and the instrument panel, or the instrument panel itself.
Depending on when the battery warning light comes on might help you figure out what is wrong. If the light comes on when just driving normal on a smooth road, then it is most likely more of an issue with the alternator not putting out enough charge or not working properly.
Battery Light :rage:
My battery light stays on when truck is off and drained batteries. When truck is on and running no battery light WTF. Plz help . Save Share Reply Quote Like. Sort by Oldest first Oldest first Newest first Most reactions. TDavis1992. 11800 posts · Joined ...
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