gauges are bouncing, the air bag light flashes after installing a new battery?

1998 DODGE RAM
200,000 MILES • 5.9L • V8 • 4WD • AUTOMATIC
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ZANDRA DANIEL
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The truck has been sitting for a good while. I finally went to move it and it wouldn't start. Went and just for a new battery and it started right up. But my gauges are bouncing, the air bag light flashes. But my battery won't stay charged. I'm assuming it's my alternator. Does that have something to do with it?
Jul 3, 2023 at 11:48 PM
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STRAILER
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Yep, it sure can, it sounds like the alternator has a diode that is out on it is causing AC voltage to enter the electrical system, but to be sure here is a guide you can use to confirm the issue:"

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/how-to-replace-an-alternator

Check out the images (below). Please let us know what happens.
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Jul 4, 2023 at 12:44 PM