Battery gauge jump to high side
30

Asked by Viper_17762315 Jun 14, 2017 at 09:26 PM about the 2002 Ford Mustang Coupe

Question type: Maintenance & Repair

Battery gauge is jumping to high side

5 Answers
70,105

Kelly answered 6 years ago

CHECK ALL BATTERY CABLES..CHECK ALT FOR CHARGING SUCH AS A BAD DIODE

2 people found this helpful.
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157,485

Bob answered 6 years ago

Test the voltage at the battery with engine running. This voltage should be somewhere between 13.5 and 14.7 volts. If it is higher than that the alternator is overcharging and the cause needs to be found.

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