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Old 01-10-2020, 01:09 AM
Fifty150hs Fifty150hs is offline
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Join Date: Jul 2016
Location: Menlo Park, CA
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Sounds like you have a dying alternator. Running you should be seeing 13.9 to 14.3 volts. Off you should be seeing 12.3. Insufficient power on these trucks causes all kinds of gremlins. You can take your alternator to most parts stores and they will usually test it for free. It won't hurt to take your battery and have it load tested. You could have two issues going.
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