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bolt buster
New User
Jul 25, 2009, 9:30 AM
Post #1 of 6
(1171 views)
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1970 PONTIAC LEMANS ALTERNATOR LIGHT ON ? CHEV 383 CI AUTO
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 25, 2009, 10:08 AM
Post #2 of 6
(1167 views)
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Re: ALTERNATOR LT ON
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What have you done? Have you tested the charging voltage across the battery?
What is it?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bolt buster
New User
Jul 25, 2009, 12:38 PM
Post #3 of 6
(1159 views)
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Re: ALTERNATOR LT ON
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TESTED BATTERY 12.60 YOLTS BACK OF ALTERNATOR 12.62VOLTS UNPLUGED CHOKE WIRE TO CARB LIGHT OUT
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 25, 2009, 12:41 PM
Post #4 of 6
(1155 views)
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Re: ALTERNATOR LT ON
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If you got those readings with the engine running, then the alternator is not charging. I can't remember if that year had an external or internal voltage regulator. If it's iinternal, then change the alternator. If it's external, then you will have to full field the regulator and test it again.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Loren Champlain Sr
Veteran
/ Moderator
Jul 26, 2009, 11:39 AM
Post #5 of 6
(1144 views)
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Re: ALTERNATOR LT ON
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Hammer; That would be an internal regulator. Didn't those years have a diode, up under the dash, that would go bad? Maybe, it was a relay....can't remember. O.F. disease.
Loren
SW Washington
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 26, 2009, 11:42 AM
Post #6 of 6
(1140 views)
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Re: ALTERNATOR LT ON
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Nothing I'm aware of. The diode is internal to the alternator as far as I know.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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