Voltage fluctuations

160

Asked by Dave Sep 05, 2018 at 08:47 PM about the 2005 Pontiac Grand Prix GT

Question type: Maintenance & Repair

I have an 05 grand prix. I have replaced the belt alternator
and battery. The voltage goes up and down. I did the test
with the meter and it is telling me I have a bad ground. I
looked at the ground next to the battery and that is good.
Sometimes I get a charging system failure. Not sure what
to do next

2 Answers
26,445

taver91 answered 5 years ago

Just looking at the battery terminal or connector is not sufficient. Make sure the terminals are clean by removing them, cleaning with a wire brush, and reassembling them making certain the connection is tight.

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20

Pontiac22 answered 4 years ago

Change the positive cable going to the battery. My daughter's car was throwing the charging system failure. Changed alternator 3 times and battery plus 8 hours of diagnostic testing at a shop never found the issue. I bought a cable at Advanced Auto. Been driving it all over with no issues.

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