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

Tiny
ZANDRA DANIEL
  • MEMBER
  • 1998 DODGE RAM
  • 5.9L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
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?
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Monday, July 3rd, 2023 AT 11:48 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
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

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Tuesday, July 4th, 2023 AT 12:44 PM

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