I’m having similar issues, but my gauge is reading 12.5V. I just checked my voltage at the alternator with a meter while the truck was running and my alternator is putting out between 11.90-12.06 voltage. So I’d say my alternator is bad?
2015 Prostar voltage issues, fluctuates between 13 and just under 14
Discussion in 'International Forum' started by Big Rob71, Jan 5, 2019.
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2013Maxx Thanks this. -
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Stop wasting your money. As you can see what mine is saying. This truck was brand new when I got it from quality leasing and that’s we’re it as been. When you use the inverter it goes up some. Then goes back down when you not using it. Your truck is just fine don’t let no one take you for a ride.
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It was the alternator. Thank God it wasn’t some wiring nightmare. And thank you guys for the responses.
Heavyd Thanks this. -
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I would perform basic cable cleaning to start with. Clean all your connections at the alternator, starter, firewall grounds, battery, frame grounds and power feeds to the cab at the batteries and firewall mega fuses.
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