LS alternator wiring
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From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
LS alternator wiring
Hey guys I'm needing to add a resistor into my alternator wiring, I've got a 470 ohm 1/4 watt resistor. Will that one work okay or does it absolutely have to be at least 1/2 watt?? Thanks guys
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: LS alternator wiring
Which alternator?
F-body LS1 should use 10 Ohm 50 Watt resistor on the L-terminal circuit. That's not a guess, I have direct access to the engineer that has design control for the alternator. I think the Corvette alternator is made by Valeo but I don't know specs for that product.
F-body LS1 should use 10 Ohm 50 Watt resistor on the L-terminal circuit. That's not a guess, I have direct access to the engineer that has design control for the alternator. I think the Corvette alternator is made by Valeo but I don't know specs for that product.
Thread Starter
Supreme Member
Joined: Apr 2010
Posts: 1,198
Likes: 126
From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Re: LS alternator wiring
Which alternator?
F-body LS1 should use 10 Ohm 50 Watt resistor on the L-terminal circuit. That's not a guess, I have direct access to the engineer that has design control for the alternator. I think the Corvette alternator is made by Valeo but I don't know specs for that product.
F-body LS1 should use 10 Ohm 50 Watt resistor on the L-terminal circuit. That's not a guess, I have direct access to the engineer that has design control for the alternator. I think the Corvette alternator is made by Valeo but I don't know specs for that product.
Anyways besides that, is a 1/4 watt able to be used instead of 1/2 watt??
Last edited by thatsupnow; Apr 28, 2022 at 10:21 PM.
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From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: LS alternator wiring
Which alternator?
F-body LS1 should use 10 Ohm 50 Watt resistor on the L-terminal circuit. That's not a guess, I have direct access to the engineer that has design control for the alternator. I think the Corvette alternator is made by Valeo but I don't know specs for that product.
F-body LS1 should use 10 Ohm 50 Watt resistor on the L-terminal circuit. That's not a guess, I have direct access to the engineer that has design control for the alternator. I think the Corvette alternator is made by Valeo but I don't know specs for that product.
Joined: Mar 2001
Posts: 10,421
Likes: 2,083
Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: LS alternator wiring
That's why I cited my source of information because people rarely believe me.
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Supreme Member
Joined: Apr 2010
Posts: 1,198
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From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Re: LS alternator wiring
I see I see. Well damn I guess I'll start a search for a resistor like that. I'll be the first to admit I'm not the best educated when it comes to this side of electrical
Joined: Mar 2001
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: LS alternator wiring
You actually don't need a resistor at all if you switch the wire from L-terminal to the F-terminal. Just send F-terminal to a +12V switched source. This is how I wired it in my car because it's more simple and I didn't have to deal with that big lump of a resistor in the harness. (Don't make mistake of hooking to L-terminal without a resistor though).
That is valid for F-body LS1 alternator with regulator that meets OEM specs. I don't know if it's valid for truck and I didn't ask.
I don't think the F-terminal wiring is common knowledge so don't be surprised if you never see that info anywhere else.
BorgWarner engineer for the regulator. The engineering padres don't exist anymore.
That is valid for F-body LS1 alternator with regulator that meets OEM specs. I don't know if it's valid for truck and I didn't ask.
I don't think the F-terminal wiring is common knowledge so don't be surprised if you never see that info anywhere else.
BorgWarner engineer for the regulator. The engineering padres don't exist anymore.
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Thread Starter
Supreme Member
Joined: Apr 2010
Posts: 1,198
Likes: 126
From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Re: LS alternator wiring
You actually don't need a resistor at all if you switch the wire from L-terminal to the F-terminal. Just send F-terminal to a +12V switched source. This is how I wired it in my car because it's more simple and I didn't have to deal with that big lump of a resistor in the harness. (Don't make mistake of hooking to L-terminal without a resistor though).
That is valid for F-body LS1 alternator with regulator that meets OEM specs. I don't know if it's valid for truck and I didn't ask.
I don't think the F-terminal wiring is common knowledge so don't be surprised if you never see that info anywhere else.BorgWarner engineer for the regulator. The engineering padres don't exist anymore.
That is valid for F-body LS1 alternator with regulator that meets OEM specs. I don't know if it's valid for truck and I didn't ask.
I don't think the F-terminal wiring is common knowledge so don't be surprised if you never see that info anywhere else.BorgWarner engineer for the regulator. The engineering padres don't exist anymore.
Thread Starter
Supreme Member
Joined: Apr 2010
Posts: 1,198
Likes: 126
From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Re: LS alternator wiring
You actually don't need a resistor at all if you switch the wire from L-terminal to the F-terminal. Just send F-terminal to a +12V switched source. This is how I wired it in my car because it's more simple and I didn't have to deal with that big lump of a resistor in the harness. (Don't make mistake of hooking to L-terminal without a resistor though).
That is valid for F-body LS1 alternator with regulator that meets OEM specs. I don't know if it's valid for truck and I didn't ask.
I don't think the F-terminal wiring is common knowledge so don't be surprised if you never see that info anywhere else.BorgWarner engineer for the regulator. The engineering padres don't exist anymore.
That is valid for F-body LS1 alternator with regulator that meets OEM specs. I don't know if it's valid for truck and I didn't ask.
I don't think the F-terminal wiring is common knowledge so don't be surprised if you never see that info anywhere else.BorgWarner engineer for the regulator. The engineering padres don't exist anymore.
Oh man I think I just answered my own question. I'm gonna grab power from another spot
Last edited by thatsupnow; Apr 29, 2022 at 05:43 PM.
Supreme Member
Joined: Jul 2006
Posts: 2,881
Likes: 795
From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: LS alternator wiring
No.
The Terminal one the Starter-Motor Solenoid (with the 1 Purple Wire) is NOT a Power-Source.
That Terminal receives Power when you turn the Ignition to the "Crank Position".
The Large Stud on the Starter-Motor can be temporarily used as a Power-Source...
But at that point, just use the Battery itself instead.
The Terminal one the Starter-Motor Solenoid (with the 1 Purple Wire) is NOT a Power-Source.
That Terminal receives Power when you turn the Ignition to the "Crank Position".
The Large Stud on the Starter-Motor can be temporarily used as a Power-Source...
But at that point, just use the Battery itself instead.
Thread Starter
Supreme Member
Joined: Apr 2010
Posts: 1,198
Likes: 126
From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Re: LS alternator wiring
No.
The Terminal one the Starter-Motor Solenoid (with the 1 Purple Wire) is NOT a Power-Source.
That Terminal receives Power when you turn the Ignition to the "Crank Position".
The Large Stud on the Starter-Motor can be temporarily used as a Power-Source...
But at that point, just use the Battery itself instead.
The Terminal one the Starter-Motor Solenoid (with the 1 Purple Wire) is NOT a Power-Source.
That Terminal receives Power when you turn the Ignition to the "Crank Position".
The Large Stud on the Starter-Motor can be temporarily used as a Power-Source...
But at that point, just use the Battery itself instead.
Supreme Member
Joined: Jul 2006
Posts: 2,881
Likes: 795
From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: LS alternator wiring
Congrats!
Enjoy and have fun!
Enjoy and have fun!
Thread Starter
Supreme Member
Joined: Apr 2010
Posts: 1,198
Likes: 126
From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
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