puzzling alternator problem |
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puzzling alternator problem |
jaybird840 |
Dec 27 2007, 05:14 PM
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#1
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Member Group: Members Posts: 163 Joined: 27-September 06 From: Austin, TX Member No.: 6,927 Region Association: Southwest Region |
Trying to figure out a charging system issue I'm having. My alternator doesn't appear to be putting out any juice... 12.7 volts by multimeter coming from the battery with no key on. 12.5 volts with car running. Idiot light on the alternator appears to be working. If the idle drops under about 400 rpm, my gen light will come on (making me think the light's working as designed, I guess). Voltage meter in the console shows a flat 12v while running (drops to 10v with headlamps lit). All that said, is the voltage regulator internal or external on 'teeers ('75 1.8). If it's external, how can I test it. Best course of action??? Thanks all!!!
--jaybird (IMG:style_emoticons/default/headbang.gif) |
dr914@autoatlanta.com |
Dec 27 2007, 06:02 PM
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#2
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914 Guru Group: Members Posts: 8,055 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
Trying to figure out a charging system issue I'm having. My alternator doesn't appear to be putting out any juice... 12.7 volts by multimeter coming from the battery with no key on. 12.5 volts with car running. Idiot light on the alternator appears to be working. If the idle drops under about 400 rpm, my gen light will come on (making me think the light's working as designed, I guess). Voltage meter in the console shows a flat 12v while running (drops to 10v with headlamps lit). All that said, is the voltage regulator internal or external on 'teeers ('75 1.8). If it's external, how can I test it. Best course of action??? Thanks all!!! --jaybird (IMG:style_emoticons/default/headbang.gif) the quickest check is to replace the external voltage regulator on the relay board and clean the ground at the right firewall from the battery and the rear trans ground strap and recheck. (also make sure the battery terminals and posts are clean |
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