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I've had a scanguage on my truck for years and today while on vacation I noticed the voltage was fluctuating between 12.5-13.5 while driving. It has always ran at 13.5-13.7 I checked it with a fluke and it is a solid and steady 13.8v at idle. Why would that gauge be fluctuating like that? Truck seems to be running fine.
I've had a scanguage on my truck for years and today while on vacation I noticed the voltage was fluctuating between 12.5-13.5 while driving. It has always ran at 13.5-13.7 I checked it with a fluke and it is a solid and steady 13.8v at idle. Why would that gauge be fluctuating like that? Truck seems to be running fine.
Just for good measure, pop that hood open and double check the connection to the back of the alternator.
Once in a blue moon they can for some reason come loose, and if that's the case it will make that big fluctuation.
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