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10-12-2011, 04:25 PM
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#1 | |
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AF Newbie
Join Date: Apr 2010
Location: Livingston, Alabama
Posts: 38
Thanks: 1
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Battery Gauge Meter
When I hit the brakes I can see my battery gauge meter twitch a little. My battery gauge meter keep waving back and forth when I get off the gas at a low RPM. What this can be?
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10-12-2011, 05:11 PM
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#2 | |
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AF Enthusiast
Join Date: Aug 2011
Location: Beachside
Posts: 2,000
Thanks: 4
Thanked 303 Times in 301 Posts
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Re: Battery Gauge Meter
Could be low alternator output. A little movement when a electrical load is added the system, such as brake lights, head lights, ect...is normal.
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10-12-2011, 06:57 PM
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#3 | ||
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AF Fanatic
Join Date: Oct 2007
Location: EVERETT, Massachusetts
Posts: 10,898
Thanks: 8
Thanked 432 Times in 431 Posts
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Re: Battery Gauge Meter
Quote:
with a voltmeter at the battery measure the voltage with the engine running, no lights,ac etc on. then turn on ac lights heater/ac blower to max and the voltage should not drop. If the voltage drops or pulses this would indicate a bad regulator/diode assy of the alternator. the voltage should be 13.5 volts at 100deg f . the voltage at 70 deg f will be about 14.25 volts. this is with a engine at normal operating temperture at idle. THE VOLTAGE SHOULD NOT VARY WITH RPM OR NORMAL VEHICLE electrical LOADS AS BUILT. If you have an aftermarket HI POWER sound system this would overload the alternator output ability and you will see a change in voltage. |
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