El Camino charging.
November 1st, 2014, 3:52 PM
#1
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El Camino charging.
'83 El Camino - 305. New battery and just installed second replacement alternator (bench checked at store). All I show for output on both is 12.6V on my meter. What do I need to replace besides battery and alternator?
November 1st, 2014, 5:23 PM
#2
I'm unsure if the voltage regulator is integral to the alternator or a separate unit.
where are you checking voltage at, battery or alternator? You should check at both. If still just open circuit battery voltage at both, you need to check for power to the field coils. if you can locate a wiring diagram, I can help with the testing.
where are you checking voltage at, battery or alternator? You should check at both. If still just open circuit battery voltage at both, you need to check for power to the field coils. if you can locate a wiring diagram, I can help with the testing.
Last edited by tech2; November 1st, 2014 at 5:26 PM.
November 1st, 2014, 9:16 PM
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Other than the BATT post there's a two wire terminal which Chilton says is an integral voltage regulator connector - the Delco SI series for which I have a schematic. I've been measuring voltage at both battery and alternator post, using the frame for ground. Both show 12.6V - same as a fully charged battery which it is since I've been using the charger every day. That would mean the alternator is doing virtually nothing. When I watched the bench test at O'Reilly, it showed 14.7V output.
Last edited by olderndirt; November 1st, 2014 at 9:30 PM.
November 2nd, 2014, 10:20 AM
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It's a two pin only connector - facing forward, one brown on the drivers' side of the alternator; the other red on the passenger side - both on the two pin connector.
November 7th, 2014, 4:05 PM
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Did the voltage drop tests, everything turned on 2000 rpm - positive -0.02 negative -0.03. Cleaned both battery posts and cable ends - 13.3V at idle, no change with increased rpm.
Last edited by olderndirt; November 7th, 2014 at 5:25 PM.