High volts when running @2000RPM - Diesel Forum

igotrobbed · 10-11-2005, 04:26 PM

I've been trying to figure out why my dash volt meter keeps redlining at 18v @2000RPM+ .

I've changed the voltage regulator 3 times(unplugged batteries) . Still same thing . What else can I check? My alternator seems fine .

Joe Mc · 10-11-2005, 04:50 PM

Have you checked this with a hand-held meter, just to verify that the dash meter is OK?

tomcimzural · 10-11-2005, 09:48 PM

I had the same problem and it was the meter in the dash that was bad.
Sometimes you can find a good one in a salvage yard. The price quoted me from the local dealer was about $180.00 with my discount.
TomC

tim94f250 · 10-11-2005, 10:35 PM

As Joe suggested, get a digital volt/ohm meter and take your readings with that. If it was overcharging that badly, you would more than likely smell the batteries cooking. Tim

Cowboy1985 · 10-12-2005, 04:48 PM

Mine is the opposite.. cant get the dash meter to read more than about 13 volts.. but with a hanheld voltmeter measured at the batteries i get what i'm supposed to, 14,2 volts...