Why is my charging system goes over 15 volts when I raise rpm

Asked by Richard Apr 14, 2016 at 08:45 AM about the 2005 Dodge RAM 1500 SLT Quad Cab LB RWD

Question type: General

charging system goes over 15 volts when I apply foot to throttle at 1k and
above. at idle its at 14.4 confused please help?

4 Answers
7,540

Dzemo answered 8 years ago

check your voltage regulator..and/or maybe alternator..some voltage regulators are internal (inside alternator)..

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157,475

Bob answered 8 years ago

How high does the voltage go? 14.0 to 14.6 is normal, but anything much higher than that may indicate a bad alternator or voltage regulator (likely built in to the alternator). Very high charge voltage is hard on light bulbs, batteries and other electronic items. I would use a volt meter to measure the voltage, engine running, at the battery. If out of spec. get the alternator tested.

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440

RRGUY answered 8 years ago

Most likely bad voltage regulator like mentioned. It can also overcharge battery, cause warning light to come on or give bad reading on gauges.

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