Charging problem Surprise
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Junior User
Joined: Jul 2003
Posts: 51
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From: Delaware
Charging problem Surprise
Background info: 70 351 Cleveland in a Mustang. Stock alternator just not enough amps and replaced for higher amperage unit. Regulator replaced at same time.
100 amp unit was dropped in today, and it's not charging. It's possible that it momentarily charged which makes me question if it was the regulator blowing due to the high amp rating of this alternator? I'd like to know if there is a way to test the alternator while on the vehicle wihtout any special equipment. I was contemplating give the field terminal 12 volts, but they was afraid I could make matters worse
THANKS A lot guys. I know you always are on top of things. Sorry I sold my truck and went to the dark side, but I needed a family vehicle and the Mustang is just my baby on the side.
100 amp unit was dropped in today, and it's not charging. It's possible that it momentarily charged which makes me question if it was the regulator blowing due to the high amp rating of this alternator? I'd like to know if there is a way to test the alternator while on the vehicle wihtout any special equipment. I was contemplating give the field terminal 12 volts, but they was afraid I could make matters worse
THANKS A lot guys. I know you always are on top of things. Sorry I sold my truck and went to the dark side, but I needed a family vehicle and the Mustang is just my baby on the side.
Tuned
Joined: Feb 2003
Posts: 495
Likes: 0
From: Cincinnati, Ohio
Amperage of the alternator does not effect the regulator's ability to manage charging. Is the wiring for the circuit from the alternator to the regulator supposed to be the same for both alternators? Are you sure the 100 amp doesn't have an internal regulator? Are you sure the alternator is good? Sorry if these seem like dumb ?s but I have seen the internal regulator problem on another alternator swap. Also, if the wiring from the alternator to the regulator isn't the same this could definitely be your problem. Used to be you could stick a screwdriver into a test slot on the alternator to verify the alternator was charging.
John
John
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Junior User
Joined: Jul 2003
Posts: 51
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From: Delaware
Thanks John.
I got it all worked out as this morning I used a + lead to quickly test if the alternator was good. I then tested the F output on the regulator and it was dead. Got a new regulator and voila...charging.
I got it all worked out as this morning I used a + lead to quickly test if the alternator was good. I then tested the F output on the regulator and it was dead. Got a new regulator and voila...charging.
