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Old 10-22-2021, 12:46 PM   #8
HO455
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Join Date: Feb 2016
Location: Portland Oregon
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Re: 72 c10 alternator question

Be aware if your truck came with the 37 amp alternator it has a different wiring harness than a truck that came with the 63 amp alternator.
This is not shown on any of the commonly available schematics. The 2 that I have parted the harnesses weren't in the best shape so I've never seen a complete unmolested one. But there are definite differences.
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