Amp gauge

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Aug 24, 2008 | 10:43 PM

truknut1972

Thread Starter

Freshman User

Joined: Apr 2008

Posts: 32

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Amp gauge

I have a 92 F150 w/5.0, E4OD, and I was wondering about my amp gauge. I purchased it in April '08, and every since I owned it, the amp gauge has went passed NORMAL... I even took it to the local Advance Auto Parts to have it checked for charging battery or the alternator. It checked fine. But the battery also is leaking some acid, I have cleaned it and now it's game back. When I drive it at night, with the lights and air on the needle sits about right, sometimes.. And also when the truck is running and I roll the window down with the power button the needle moves. What could be wrong? Thanks, Jeff.

Aug 25, 2008 | 12:51 AM

gweeds

More Turbo

Joined: Mar 2008

Posts: 658

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K, ammeters measure the amount of current flowing across a shunt in ampeers. Is your gauge labeled in amps? Becuase "normal" really doesnt mean much...

Aug 25, 2008 | 07:20 AM

netscaner

Elder User

Joined: May 2007

Posts: 754

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From: Solon, Ohio

I don't think you have an ammeter, that's a voltmeter.

Aug 25, 2008 | 07:22 AM

alz

Fleet Mechanic

Joined: Nov 2004

Posts: 1,324

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From: Michigan

That's pretty normal. Use a handheld voltmeter to check your battery with truck off. Should be about 12v. Start truck and check again. At idle, should read about 14v. The voltmeter will fluctuate as you use electrical components on your truck. The fan, power windows, lights etc. Check to make sure you have good connections at the alternator and the battery.