Wiring ALT UP?
Thread Starter
On The Tree
Joined: Feb 2015
Posts: 136
Likes: 0
From: columbus ohio
Wiring ALT UP? I was told to use the brown wire coming off the (TRUCK) alternator with a light in between but can't get it to charge. Took it off and had it tested and it's a good working alternator. I'm doing something wrong. It's a 2005 alternator from a 6.0 engine ----in a 1998 Camaro not using a computer. Can someone explain to me how to get it to charge? Thanks Bill. Alternator is a four pin plug but with only two wires coming out of the plug. Thanks
Thread Starter
On The Tree
Joined: Feb 2015
Posts: 136
Likes: 0
From: columbus ohio
Thanks that gets me on the right track. Reason i say that is because i have a brown wire and a light than or could be even a white wire coming off the alternator. No red wire and both wires are small equal in size. Big help and thanks again Bill
Trending Topics
TECH Regular
Joined: Sep 2011
Posts: 431
Likes: 1
From: Washington
Try a different light bulb. In the beginning testint mine out, i wired in my test light and it charged just fine. It should/will charge with just the one wire, the rewire is a sense wire and detects voltage, on my standalone I wired it to my injectors to account for any voltage drop
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
On The Tree
Joined: Feb 2015
Posts: 136
Likes: 0
From: columbus ohio
you are providing 12v to the light bult right? Alternator provides the ground when it isnt charging to turn the light on. If the diode trio fails, the a/c current leaks into the wire and DC current will see that as a ground also (light turns on)
Thread Starter
On The Tree
Joined: Feb 2015
Posts: 136
Likes: 0
From: columbus ohio
I got something wrong i guess. it's over charging 16 volts.
What I did so far was take a light out of a gauge i had laying around and ran a wire off the brown wire from the alternator to ignition switch and wired the light into this wire using the white wire off the light which resulted into nothing but then took the only other wire off the alternator and put it on the post back of alternator and it charged but 16 volts and probably more because my tester only goes to 16 volts. What is it I'm missing here?
What I did so far was take a light out of a gauge i had laying around and ran a wire off the brown wire from the alternator to ignition switch and wired the light into this wire using the white wire off the light which resulted into nothing but then took the only other wire off the alternator and put it on the post back of alternator and it charged but 16 volts and probably more because my tester only goes to 16 volts. What is it I'm missing here?
Thread Starter
On The Tree
Joined: Feb 2015
Posts: 136
Likes: 0
From: columbus ohio
I found out i was hooking up the light wrong but that didn't change a thing. Tried the relay set up and still pegging 16 volts. I had the alternator tested yesterday but i didn't bother to see if the man had been drinking or not.LOL. I'll try to locate a resistor before getting a new alternator.
Thread Starter
On The Tree
Joined: Feb 2015
Posts: 136
Likes: 0
From: columbus ohio
Ill give it a try again here in a few days i drive a semi for a living and free time is hard to come by during the week. Thanks Again for the help. I have a bunch of relays laying around I'll try a different one.
Thread Starter
On The Tree
Joined: Feb 2015
Posts: 136
Likes: 0
From: columbus ohio
Still fighting the alt problem. Had to get fans on car before I could do much of anything because it was running hot anyway I got that problem taken care and ordered a 100ohm resistor and installed in line. Today was the first chance I got to mess with it and it still was spiking 18 volts at times and other times it was anywhere from 13.2 - 16 volts. Let it run a while and car can rough but the second i unhooked the alternator wire car ran smooth and normal but volts stayed at 12.2 never moving then wire coming off kill switch to back of alternator started smoking and melted all to hell? Ran new wire from kill switch to back of alternate tried running car again volts all over the place and wire got pretty hot and again unhook alternator wire with the 100ohm in it volts drop to 12.2 but car stopped missing and smoothed out. Anyone have any thoughts on whats going on?
Last edited by Driver2; May 21, 2017 at 07:07 PM.
Thread Starter
On The Tree
Joined: Feb 2015
Posts: 136
Likes: 0
From: columbus ohio
On the kill switch is two small places with hook ups/ studs..one on top and one on bottom the one on top has a wire coming from battery and one bottom is the wire going to back of alternator if you can follow me?