Alternator wiring
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Elder User
Joined: Feb 2003
Posts: 850
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From: Winnipeg Canada
Alternator wiring
Hey guys I have a 54 F-100 with 351W. I am using the Duraspark II ignition. I was told just like in a Bronco. Well I have an alternator from a 92 Mustang GT, but it looks to me that wiring it up is going to be a pain. Would using an alternator from a Bronco be a better solution? Does anyone have pics of what they look like? Or any wiring diagrams I can follow on how to wire up this motor?
Any help will be greatly appreciated, thanks.
Any help will be greatly appreciated, thanks.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Alternator wiring
The '92 alternator is probably the best way to go, assuming you can bolt it up and align the pulley. It should use only 2 wires: one large one for the power, and one tiny one (LG/R, if memory serves). The large one goes to the starter relay (to the battery) and the small one goes to the ALT light, which you MUST have for the alternator to work. Look up the '92 Mustang wiring in a Haynes manual or maybe on a Mustang website.
Posting Guru
Joined: Sep 2002
Posts: 2,195
Likes: 1
From: San Antonio, Texas
Alternator wiring
Hey if there are six wires two plugs, I would not use that alternator if my life depended on it, That would be the 2G model your refering too. They are total crap and like to burst into flames at times. You would be much happier with a 1G with outside regulator like original 65 or when they stopped in 87 or 88, not sure. If your looking for an internal regulated, you should spend the money and buy a 3G alternator One stud, 3 wires one plug, Ign. Light, sense. It has to be on of the best alternators built, I'm going to a 3G when I have the money.
Good luck bro.
Good luck bro.
Posting Guru
Joined: Sep 2002
Posts: 2,195
Likes: 1
From: San Antonio, Texas
Alternator wiring
I could ever so wonder why it was free. 
You would have more trouble wiring it up then just finding a 1G or a 3G. And less possible problems.
Just a note, I work in the field and am very educated in this area.
Do what you wish and good luck.
Just my 2 cents.
You would have more trouble wiring it up then just finding a 1G or a 3G. And less possible problems.
Just a note, I work in the field and am very educated in this area.
Do what you wish and good luck.
Just my 2 cents.
Posting Guru
Joined: Sep 2002
Posts: 2,195
Likes: 1
From: San Antonio, Texas
Alternator wiring
Oh yea, a 2G is rated about 85 to 90 amp, the standard 3G 95 amp, and a 1G is usually 65amp.
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Elder User
Joined: Feb 2003
Posts: 850
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From: Winnipeg Canada
Alternator wiring
The alt was free because it was from a written off Mustang. I got it rebuilt for free by a company that does rebuilds of starters and alternators.
Would you happen to have a wiring diagram for a 3G alternator then?
Would you happen to have a wiring diagram for a 3G alternator then?
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Posting Guru
Joined: Sep 2002
Posts: 2,195
Likes: 1
From: San Antonio, Texas
Alternator wiring
Nevermind that post, the pic didnt work.
Here you go though.
L - light
S- stater
A- B+
Battery is also ign. Plus the output wire that goes to the stud in the back of the alternator.
Hope this helps.
Here you go though.
L - light
S- stater
A- B+
Battery is also ign. Plus the output wire that goes to the stud in the back of the alternator.
Hope this helps.
Thread Starter
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Elder User
Joined: Feb 2003
Posts: 850
Likes: 0
From: Winnipeg Canada
Alternator wiring
okay. well, im gonna try with this 2G alt.
I was given this schematic to help me out.
There is 2 harness's, 3 wires to each. on the regulator, i can see the 3 wires on schematic, on the alternator, only 2, is the third wire the ground that is in with the diode circuitry there?
I was given this schematic to help me out.
There is 2 harness's, 3 wires to each. on the regulator, i can see the 3 wires on schematic, on the alternator, only 2, is the third wire the ground that is in with the diode circuitry there?
