Alternator wiring
Thread Starter
Junior Member
Joined: Sep 2012
Posts: 3
Likes: 0
From: Jefferson AR 72132
Car: 1985 Camaro
Engine: 430 hp 350
Transmission: 700r4
Axle/Gears: 342 posi
Alternator wiring
Kinda new to the third gen camaros so needing a little help and advice. Bought a 85 model that had originally a 2.8 with idiot lights. Have put a 350 1st gen engine in it. Went to gauges, all mechanical,and they are working. Going by wiring diagram the brown wire that used to go to light is hooked up to alt but no light. Alt seems to be charging as when the engine is running as it is running a straight 14 volts give or take. Problem is that when I hook the battery up, the alt has a high pitched whine, no matter what position key is in. Do I need to do something else with the brown wire as I think this is where all my problem is coming from. Unhook wire? put some kind of resistor in it and hook to a battery wire? What to do, what to do? thanks Jay
Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 12
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Refreshing Alternator Whine
One of two things happened.
You mis-wired the alt or it went bad coincidentally.
Make sure you no longer use terminal L on the alt.
The heavier red wire goes to the positive stud, and should have power at all times.
The thinner red wire goes to terminal S (the sensing circuit) and should have power at all times.
The brown wire goes to terminal F (the turn-on input) and should have power when the key is in the RUN position.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
After The Fourth Barrel Roll I Lost Control Of The Car
You mis-wired the alt or it went bad coincidentally.
Make sure you no longer use terminal L on the alt.
The heavier red wire goes to the positive stud, and should have power at all times.
The thinner red wire goes to terminal S (the sensing circuit) and should have power at all times.
The brown wire goes to terminal F (the turn-on input) and should have power when the key is in the RUN position.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
After The Fourth Barrel Roll I Lost Control Of The Car
Thread Starter
Junior Member
Joined: Sep 2012
Posts: 3
Likes: 0
From: Jefferson AR 72132
Car: 1985 Camaro
Engine: 430 hp 350
Transmission: 700r4
Axle/Gears: 342 posi
Re: Refreshing Alternator Whine
Ok thanks, dont think that the alt is dead. It is charging. the concern was the whine when battery hooked up and engine not running. The brown wire is not hooked to anything. Just dead ends in the dash. Will try and hook to a keyed wire and see if that fixes thanks.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Alternator wiring
You don't state what type ( SI or CS ) alt you used with your 350 swap
If CS then read this
http://www.camaros.net/forums/showpo...21&postcount=4
Is not straight 12V ; has to have a resistor or the idiot light bulb in the circuit for it to work correctly
http://alternatorparts.com/cs130_sbpage3.htm
If CS then read this
http://www.camaros.net/forums/showpo...21&postcount=4
Is not straight 12V ; has to have a resistor or the idiot light bulb in the circuit for it to work correctly
http://alternatorparts.com/cs130_sbpage3.htm
Senior Member
Joined: Feb 2009
Posts: 874
Likes: 18
From: Brisbane, Australia
Car: 1985 Pontiac TransAM
Engine: 400SBC 24x conversion
Transmission: T700r Stage2 Shiftkitted
Axle/Gears: 2.77 9 Bolt
Re: Refreshing Alternator Whine
One of two things happened.
You mis-wired the alt or it went bad coincidentally.
Make sure you no longer use terminal L on the alt.
The heavier red wire goes to the positive stud, and should have power at all times.
The thinner red wire goes to terminal S (the sensing circuit) and should have power at all times.
The brown wire goes to terminal F (the turn-on input) and should have power when the key is in the RUN position.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
After The Fourth Barrel Roll I Lost Control Of The Car
And in all the diagrams I've found the Filed wire is the one on the left and the sensing wire is the one on the right, so...WTF has happened to my car?
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