alternator help please |
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alternator help please |
arsprod |
May 1 2021, 02:07 PM
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#1
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Member Group: Members Posts: 199 Joined: 14-March 15 From: Indianapolis Member No.: 18,519 Region Association: Upper MidWest |
Charging light came on recently and I knew the car still had the original alternator. So instead of testing (assume) I just installed a new (rebuilt) alternator. Same problem - light's still on. Also replaced voltage regulator with solid state unit - didn't fix.
With the alternator disconnected from the relay plate the light goes off. I have 12v at each of the 3 pins for the alternator connector at relay plate but nothing from the (new) cable from the alternator. Please don't tell me I have another bad alternator... but do I have a bad alternator? I'm stumped. Ground straps all look find. Thanks! |
Spoke |
May 2 2021, 12:47 AM
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#2
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Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
With everything connected as it should be, with engine running, measure the voltage on each conductor on the alternator connector on the relay board. Connect the negative probe on the voltmeter to chassis ground, not the engine case. What voltages do you see?
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