Voltage problems
Thread Starter
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Fleet Mechanic
Joined: Jul 2000
Posts: 1,491
Likes: 343
From: SE Iowa
Voltage problems
Im stumped on this one! The voltage gauge on my '90 is only reading about 10-11 volts. I've tested the battery w/out motor running and get 13.62volts. Starting the motor and checking again, I get over 15. I've had the alt. tested and it fine. The battery is only a few months old, so Im running out of ideas??? I know this is whats causing my truck to be kinda slugish after warmup. so, any help would be greatly appreciated!
Thanks
Stryder
:-X11
Thanks
Stryder
:-X11
Posting Guru
Joined: Jan 2001
Posts: 1,124
Likes: 1
From: Rural Florida Panhandle
Voltage problems
Sounds like the volmeter you are testing with needs calibration.
It would be very rare for a battery to show more than about 12.5 volts several minutes after the engine is off. So I am thinking your tester is off. You should show between 13.5 and 14.3 volts when charging.
I always use a digital voltmeter for checking battery voltage.
Also your voltmeter gauge is probably off in the opposite direction.
Winford
It would be very rare for a battery to show more than about 12.5 volts several minutes after the engine is off. So I am thinking your tester is off. You should show between 13.5 and 14.3 volts when charging.
I always use a digital voltmeter for checking battery voltage.
Also your voltmeter gauge is probably off in the opposite direction.
Winford
Thread Starter
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Fleet Mechanic
Joined: Jul 2000
Posts: 1,491
Likes: 343
From: SE Iowa
Voltage problems
Well, Winfordr your correct. The digital voltmeter that I use was off a little. I took it over to my brother, who is an electrican, and he recalibrated it for me. It now reads 12.14V non-running/ 14.75 running. Okay, next ? How does the dash come off? I dont see ANY screws! I'm assuming they are hidden under the plastic "wood" trim, but thought I'd ask before I pry and break something. Also, if the voltage is low at the gauge, what would cause this?
Thanks a million!
Stryder
:-X11
Thanks a million!
Stryder
:-X11
