Altenator wiring questions
03-23-2007, 04:15 AM
#1
Senior Member
Thread Starter
Join Date: Dec 2001
Location: Jacksonville, FL
Posts: 324
As some of you might remember after breaking a few parts on my old FB at an autocross i decided to built a Turbo FC just for racing events. After I bought the FC i went to the guys house 5 hours away to find out it barely ran. After about 3 hours of tinkering with it i found a way to make it limp the 5 hour drive home for the tear down. The engine was rebuilt but basicly all the wiring in the car was chewed by mice as it sat in storage so i cut every wire out of the car and started from scratch.
At this point i have all the wires from the stand alone ecu in and the engine is running strong, I have rewired all the lights and they are working well....BUTTTTT......................
How do i wire in the altonator to make it work. there is one stud sticking out from the back pointing to the drivers fender, i'm guessing that goes directly to the battery?? Than there is a plug on the back side with two wires in it.... what do they do? Any help would be nice, the FSM dont tell me **** and i dont have one of the haynes books.
At this point i have all the wires from the stand alone ecu in and the engine is running strong, I have rewired all the lights and they are working well....BUTTTTT......................
How do i wire in the altonator to make it work. there is one stud sticking out from the back pointing to the drivers fender, i'm guessing that goes directly to the battery?? Than there is a plug on the back side with two wires in it.... what do they do? Any help would be nice, the FSM dont tell me **** and i dont have one of the haynes books.
03-24-2007, 12:17 PM
#6
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Join Date: Dec 2002
Location: Wayne, NJ
Posts: 4,837
well i gave you a lead, aka check the driver's side wiring harness diagrams and youll have to find it somewhere there.
why would you cut the driver's harness? i guess if im bored ill waste my time looking through diagrams for you, nevermind the fact you havent even mentioned a year or model.
kevin.
why would you cut the driver's harness? i guess if im bored ill waste my time looking through diagrams for you, nevermind the fact you havent even mentioned a year or model.
kevin.
03-26-2007, 01:49 PM
#7
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Join Date: Mar 2004
Location: A2, MI
Posts: 453
yea, at the very least we need to know S4 or S5, because the alternator types and wiring was different between series. If you search for FD alternator you will come up with a few pictures on how to wire S4, S5, and S6 alternators into an FC.
The actual plug on an S4 went into the engine harness (on drivers side of engine bay), and is a charging signal (for the ECU, batt indicator light, stuff like that) and + voltage IIRC, and the post i believe is ground, altho look these up for yourself, since its been a while since i dealt with this system on my car.
The actual plug on an S4 went into the engine harness (on drivers side of engine bay), and is a charging signal (for the ECU, batt indicator light, stuff like that) and + voltage IIRC, and the post i believe is ground, altho look these up for yourself, since its been a while since i dealt with this system on my car.
03-26-2007, 04:35 PM
#9
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Join Date: Nov 2002
Location: Cincinnati, Oh hi hoe!
Posts: 2,286
Originally Posted by toplessFC3Sman' post='865414' date='Mar 26 2007, 02:49 PM
yea, at the very least we need to know S4 or S5, because the alternator types and wiring was different between series. If you search for FD alternator you will come up with a few pictures on how to wire S4, S5, and S6 alternators into an FC.
The actual plug on an S4 went into the engine harness (on drivers side of engine bay), and is a charging signal (for the ECU, batt indicator light, stuff like that) and + voltage IIRC, and the post i believe is ground, altho look these up for yourself, since its been a while since i dealt with this system on my car.
the post is hot, not ground, sparks if you hit it with a wrench while turning a bolt.
ask me how i know.
03-27-2007, 12:28 AM
#10
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Thread Starter
Join Date: Dec 2001
Location: Jacksonville, FL
Posts: 324
I have a 86 turboII, everyone keeps talking about a wire harness on the drivers side, i have 7 wires comming through there, big one for my starter, small one for my starter, and 5 for my coil packs. Thats it, i havnt wired up my lights yet. This isnt rocket sciance guys. do i even need to use the two small wires scince i'm runing a stand alone ecu.