 alternator help please |
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| 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! |
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| arsprod |
May 2 2021, 07:18 AM
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#2
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Member Group: Members Posts: 199 Joined: 14-March 15 From: Indianapolis Member No.: 18,519 Region Association: Upper MidWest |
Yeah, I've stared at this for awhile now. I keep coming back to bad or missing alternator ground. I know it's case grounded at the mounting bracket. I think I'll try running a ground wire from the pivot bolt to the transmission ground strap.
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| ClayPerrine |
May 2 2021, 12:47 PM
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#3
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Life's been good to me so far..... Group: Admin Posts: 15,519 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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QUOTE(arsprod @ May 2 2021, 08:18 AM)  Yeah, I've stared at this for awhile now. I keep coming back to bad or missing alternator ground. I know it's case grounded at the mounting bracket. I think I'll try running a ground wire from the pivot bolt to the transmission ground strap. If the alternator is bolted onto the motor, then it is grounded. If you want to verify it, using the ohm meter function, touch one end to the alternator case and one end to the engine case. You should get 0 ohms. Then repeat the process between the engine case and the negative battery terminal. You should again get 0 ohms. Clay |
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Posts in this topic
arsprod alternator help please May 1 2021, 02:07 PM
Spoke With everything connected as it should be, with en... May 2 2021, 12:47 AM arsprod 12V at each on the relay board May 2 2021, 06:38 AM
Spoke
12V at each on the relay board
Something is not... May 2 2021, 07:13 AM arsprod
Yeah, I've stared at this for awhile now. I ... May 2 2021, 01:06 PM arsprod Follow up, just returned from rebuilder. "Oh ... May 3 2021, 10:34 AM |
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