Battery gauge fluctuations
- Thread starter Wings720
- Start date
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What year? Later NBS models have RVC, which regulates the battery charge voltage.
if there is a clamp looking module with a harness attached to it on the ground cable next to the battery then that is normal based on the computer calculated battery temperature and electrical load on the system
I believe so. Will post a pic asap.
NO RVC on a 2003. The sensor would be clamped to the NEGATIVE cable.
Measure voltage with a DVOM to confirm voltage fluctuation (don't necessarily trust IP gauge). Inspect, clean, and test main grounds and the cable from the alternator to the battery, and condition of battery. Have alternator tested.
Measure voltage with a DVOM to confirm voltage fluctuation (don't necessarily trust IP gauge). Inspect, clean, and test main grounds and the cable from the alternator to the battery, and condition of battery. Have alternator tested.
Ty. I just got a new battery (2 days ago) alternator tested good. Will check grounds today.
not likely, get a multi-meter and verify the voltage output directly at battery and also at the alternator output while idling.
if you get fluctuation like it shows on the cluster then either the alternator is goofy, or the alternator cable is goofy or the battery cable or bad ground.
if you do not get the same fluctuation at the battery as you do on the cluster then there is something else going on but I wouldn't dig into that until you verify under the hood.
what was the reason for replacing the battery?
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