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LG4 Alternator plug wiring

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Old Sep 1, 2008 | 10:45 PM
  #1  
KYLE87's Avatar
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From: Texas
Car: 1987 Camaro
Engine: 5.7
Transmission: 700R4
LG4 Alternator plug wiring

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Last edited by KYLE87; Feb 15, 2022 at 02:47 PM.
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Old Sep 1, 2008 | 11:28 PM
  #2  
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From: Fort Worth, TX
Car: 82 Sport coupe
Engine: 355 semi roller
Transmission: TH-350 B&M ratchet shifter
Axle/Gears: 3.73 Eaton Posi
Re: LG4 Alternator plug wiring

The large red one goes to the starter where it connects to the battery to charge. The solid brown one is your gauge, and the last one goes to the ecm.
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Old Sep 2, 2008 | 12:01 AM
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KYLE87's Avatar
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Car: 1987 Camaro
Engine: 5.7
Transmission: 700R4
Re: LG4 Alternator plug wiring

are you talking about the same plug I just posted?

I think you are talking about the big red charge wire with the orange wire not the plug I posted
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Old Sep 2, 2008 | 12:22 AM
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From: Fort Worth, TX
Car: 82 Sport coupe
Engine: 355 semi roller
Transmission: TH-350 B&M ratchet shifter
Axle/Gears: 3.73 Eaton Posi
Re: LG4 Alternator plug wiring

yea im talkin about the one you posted. What orange wire? Allow me to rephrase....The large red wire in the picture runs from the alternator to the starter. The starter is where the wire connects to the battery wire, thus allowing it to charge. follow me?the solid brown wire is a signal wire for your volt gauge.and the brown/white wire is a volt sensor wire that goes to the ecm to tell it the voltage of the car.
thats what my haynes manual says anyways.
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Old Sep 2, 2008 | 12:27 AM
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Re: LG4 Alternator plug wiring

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Last edited by KYLE87; Feb 15, 2022 at 02:47 PM.
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