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AMP light on after alternator replacement?? 140-160 1971

If the amp light stays on when the key is removed, you have a faulty rectifier diode; or a bad connection either inside - or to - the alternator. Confirm that none of the wires other than the ground wire are touching ground; then confirm that the ground is solid. If that doesn't do it, have the alternator tested - this can be done on the car; or it can be done on the bench at your local auto electric shop.

Every single Volvo (sample size about two dozen) I've worked on that has been fitted with a Delco alternator has had alternator problems at some point.

Cameron
444,122SC
Rose City






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