Amp gauge
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Cross-Country
Joined: Sep 2007
Posts: 92
Likes: 4
Amp gauge
The amp gauge in my 93 350 7.5 just started fluctuating. It is on the higher end or the normal markings and just bouncing almost non stop . I noticed the dash lights and dome light had slight flickering. I drove 100 miles homes today and it ran fine but bounced most of the way. When I got home I put the multimeter on it and am getting 14.7-15.3 volts at the battery when it's bouncing. Seems kinda high. I have checked all my battery cables and grounds and they are tight. The cables themselves were replaced with new cable last winter. Anyone know whats going on or what I can check? Battery is also near new. Thanks
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Cross-Country
Joined: Sep 2007
Posts: 92
Likes: 4
The battery is only a year old, as I replaced that with a good quality one when I replaced all the cables. But currently with the needle of the gauge bouncing I'm reading about 15 volts on the battery. I'm thinking there's something wrong with the alternator but I don't know. I believe the voltage regulator on this is internal to the alternator and wondering if that could be it or if I'm missing something.
Hotshot
Joined: Oct 2009
Posts: 16,191
Likes: 4,800
From: Burbank, WA
I don't think you're missing anything. Your symptoms all point to a regulator not regulating like it should. If its internal with the alternator, swap it out for a good reman unit and see what happens.
Hotshot
Joined: Jun 2015
Posts: 12,878
Likes: 2,446
Sorry, my mistake you are correct. Im talking the factory gauge to indicate charging. With the word "normal" no numbers on it. Its bouncing up at the A and past the L in normal.....which in this case is not normal. It typically is pretty static reading straight down on the R or M.
The one with the numbers 8 -18 to indicate voltage?
My EB has an ammeter. It shows charging and discharging and at what rate
Seems like it to me too.
Logistics Pro
Joined: Aug 2014
Posts: 3,570
Likes: 854
With the 8-18 scale, straight down is 10 volts.
between Straight down and the 18 is approximately 14volts.
with an amp gauge, stock, would have a generator.
between Straight down and the 18 is approximately 14volts.
with an amp gauge, stock, would have a generator.
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Hotshot
Joined: Jun 2015
Posts: 12,878
Likes: 2,446
Pretty sure it has an alternator.
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