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Old Aug 1, 2024 | 09:31 PM
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Default Voltage regulator

Im upgrading my car to an LS6. I just replaced all my wiring harnesses but on the headlight harness there is an old school voltage regulator. Do I still need this or can I bypass it?
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Old Aug 1, 2024 | 10:10 PM
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Jd21476
You can buy a kit to bypass the external regulator and convert it to a 12si type....which you can then upgrade to a 94-amp 12si which could be bolted in.
You can search for Bypassing an external voltage regulator OR do a little cutting, soldering, and heat shrinking.

Take a peek at t his post: https://www.corvetteforum.com/forums...regulator.html




Originally Posted by Jd21476
Im upgrading my car to an LS6. I just replaced all my wiring harnesses but on the headlight harness there is an old school voltage regulator. Do I still need this or can I bypass it?
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Old Aug 1, 2024 | 10:15 PM
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Originally Posted by carriljc
Jd21476
You can buy a kit to bypass the external regulator and convert it to a 12si type....which you can then upgrade to a 94-amp 12si which could be bolted in.
You can search for Bypassing an external voltage regulator OR do a little cutting, soldering, and heat shrinking.

Take a peek at t his post: https://www.corvetteforum.com/forums...regulator.html
well I just installed the new harness and I am putting in a new alternator so I dont think I need the voltage regulator anymore. I assume the new alternator has an internal voltage regulator
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Old Aug 1, 2024 | 10:26 PM
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Originally Posted by Jd21476
well I just installed the new harness and I am putting in a new alternator so I dont think I need the voltage regulator anymore. I assume the new alternator has an internal voltage regulator
The only year C3 with an external regulator was 1968. Is your car a 1968?
Did you buy an alternator for a 1968? If so I wouldn't assume anything.
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Old Aug 1, 2024 | 10:27 PM
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Jd21476
A 1968 alternator requires an external regulator.
What alternator did you get. Provide part number and I can check for you.
IF it is a 12si internally regulated alternator, THEN your 1968 harness needs that bypassing contrapion....it won't work properly without it.


Originally Posted by Jd21476
well I just installed the new harness and I am putting in a new alternator so I dont think I need the voltage regulator anymore. I assume the new alternator has an internal voltage regulator
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Old Aug 1, 2024 | 10:34 PM
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Originally Posted by MelWff
The only year C3 with an external regulator was 1968. Is your car a 1968?
Did you buy an alternator for a 1968? If so I wouldn't assume anything.
my car is a ‘68 but Im swapping in a GEN III LS6 so it has a standalone harness and a new alternator
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Old Aug 1, 2024 | 10:35 PM
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Originally Posted by carriljc
Jd21476
A 1968 alternator requires an external regulator.
What alternator did you get. Provide part number and I can check for you.
IF it is a 12si internally regulated alternator, THEN your 1968 harness needs that bypassing contrapion....it won't work properly without it.
I am putting in a Powermaster 584061
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Old Aug 1, 2024 | 10:43 PM
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Just unplug the voltage regulator and jump the two outer wires together and jump the two inner wires together.... Done and voltage regulator gone.

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Old Aug 1, 2024 | 10:53 PM
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Originally Posted by Jd21476
I am putting in a Powermaster 584061
The Gen 3 harness would have no provision for an external regulator and the alternator you are using has a built in regulator.
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Old Aug 7, 2024 | 09:33 AM
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Does your LS6 alternator have 4 pins or 2 pins. Please show a photo of the alternator.
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