Low Voltage, bad alt?
Thread Starter
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Tuned
Joined: Jun 2004
Posts: 472
Likes: 4
From: Goodyear, AZ
Low Voltage, bad alt?
Hey guys, I was just wondering what your gauge runs at when you have the AC on and any other accessories. I have a tranny cooler fan and when I run the AC and stuff it doesn't seem like my alt charges as much as it used to, usually hangs around the lower part or "normal" around the N or O, but when everything is off it doesn't go up much, just wondering where everyone's gauge is running.
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
The factory guage is junk. It hardly works so as long as your battery light isn't on it probably ok. running a cooler fan and the A/C is a pretty big load so it will probably hang low for that. but as long as your battery light isn't on your probably ok.
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
If you have a volt meter take a reading at one of the batteries. At idle, with everything on you should have more than 12.5 volts. It should increase to 13.2 or higher with the engine revved to 2K RPM. The gage in the dash is not accurate.
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
mine runs around the "r" sometimes close to the "m". mine used to do that and it was batteries then the cable that charges the batteries was melted where it attached to the alternator like a week after i got new batteries.
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Thread Starter
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Tuned
Joined: Jun 2004
Posts: 472
Likes: 4
From: Goodyear, AZ
My Batteries are fairly new, just got them like maybe a year ago, Interstate batteries, and the cables are clean and look very good
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