3g alternator
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3g alternator
howdy, i was wonderin if any of yall know where i could obtain a 3g alternator and a wiring harness. its for my 1994 ford f-150.it has a 4.9l engine. basically i replaced the stock alternator 7 times cause it kept overheating and almost caught fire the last time. so im done with the stock alternators. and when i go to buy a performance alternator they only have 1 plug in and my wiring has two plug ins .any help would be much appreciated. -Pat
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Joined: Feb 2007
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From: Goose Creek SC
Welcome to FTE
I was given this place to look at....alternators and harnesses both
http://rjminjectiontech.com/?p=6
Good Luck
Bob
I was given this place to look at....alternators and harnesses both
http://rjminjectiontech.com/?p=6
Good Luck
Bob
New User
Joined: Jul 2007
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From: grapevine, tx
if ur adding an aftermarket performance alternator it should have a wiring diagram to go with it. as long as u know what wires are what off ur old system all u should have to do is put the right connectors on and plug it in. do u have a picture of the old alternator and wires and one of the new performance part?
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New User
Joined: Jun 2007
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alright thanks. but what do they mean by alternator clocking?
Originally Posted by 92F150Flare
Welcome to FTE
I was given this place to look at....alternators and harnesses both
http://rjminjectiontech.com/?p=6
Good Luck
Bob
I was given this place to look at....alternators and harnesses both
http://rjminjectiontech.com/?p=6
Good Luck
Bob
Elder User
Joined: Feb 2007
Posts: 829
Likes: 1
From: Goose Creek SC
Pretty sure that has to do with your mounting brackets......using a clock face and times ( "ie" 12:00 would be on top) to indicate where yours are on your stock alt. That way when you order you get the right mount.
Good Luck
Good Luck
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what does the "g" stand for? is it generation? I have seen it refered to in the past as 1 g 2g 3g etc . just wondering.
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Hi Pat
I thought the 94 came with a 3g? The 2g has an external fan located right behind the pulley. On the 3g, the fan is internal and not readily visible.
If your 94 came with a 3g and you have replaced it 7 times, something else is wrong. Even a 2g replaced 7 times is not right. Something is wrong other than the design of the alternator. Are you getting bad rebuilds? Running a big electrical load from a stereo or lots of lights? Got a short draining the battery so the alternator has to charge the battery from nearly dead? Something isn't right. Don't think I would put another alternator on until I spent some time thinking about what is really causing the problem.
Good Luck Frank
The G does stand for generation.
I thought the 94 came with a 3g? The 2g has an external fan located right behind the pulley. On the 3g, the fan is internal and not readily visible.
If your 94 came with a 3g and you have replaced it 7 times, something else is wrong. Even a 2g replaced 7 times is not right. Something is wrong other than the design of the alternator. Are you getting bad rebuilds? Running a big electrical load from a stereo or lots of lights? Got a short draining the battery so the alternator has to charge the battery from nearly dead? Something isn't right. Don't think I would put another alternator on until I spent some time thinking about what is really causing the problem.
Good Luck Frank
The G does stand for generation.
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Originally Posted by fmr9
Hi Pat
I thought the 94 came with a 3g? The 2g has an external fan located right behind the pulley. On the 3g, the fan is internal and not readily visible.
If your 94 came with a 3g and you have replaced it 7 times, something else is wrong. Even a 2g replaced 7 times is not right. Something is wrong other than the design of the alternator. Are you getting bad rebuilds? Running a big electrical load from a stereo or lots of lights? Got a short draining the battery so the alternator has to charge the battery from nearly dead? Something isn't right. Don't think I would put another alternator on until I spent some time thinking about what is really causing the problem.
Good Luck Frank
The G does stand for generation.
I thought the 94 came with a 3g? The 2g has an external fan located right behind the pulley. On the 3g, the fan is internal and not readily visible.
If your 94 came with a 3g and you have replaced it 7 times, something else is wrong. Even a 2g replaced 7 times is not right. Something is wrong other than the design of the alternator. Are you getting bad rebuilds? Running a big electrical load from a stereo or lots of lights? Got a short draining the battery so the alternator has to charge the battery from nearly dead? Something isn't right. Don't think I would put another alternator on until I spent some time thinking about what is really causing the problem.
Good Luck Frank
The G does stand for generation.
Banned
Joined: Feb 2021
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Hey, did this end up working out?
I have a 1994 f150 with a 4.9L and a 2g alternator as well. I’m really confused right now because a lot of parts stores say the 3g fits when I filter by my vehicle. I know 94’ f150s had 3g alternators as a factory option. Does this mean a 3g will fit in place of my 2g with no wiring changes? I can see that the bracket would would because it has holes for the 6/12 mounting positions. If anyone knows about this lmk
Mountain Pass
Joined: Sep 2005
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From: Tampa Bay, Florida
https://www.hotrod.com/articles/inst...r-older-fords/
Looks like good information there. I put an aftermarket 3g alternator in my '92 in 2008 or so. 220 amp. That company gave me a simple wiring diagram which I can't find (hard drive failure).
I was following this article https://www.fourwheeler.com/project-...rical-upgrade/
That article doesn't mention the OEM fungible wire from the 2g alternator to the battery wasn't big enough to handle the extra amps. Found that out the hard way when I smelled the magic smoke one night :-(
I replaced that with a much larger cable and an inline fuse. I've learned a lot since then....
Looks like good information there. I put an aftermarket 3g alternator in my '92 in 2008 or so. 220 amp. That company gave me a simple wiring diagram which I can't find (hard drive failure).
I was following this article https://www.fourwheeler.com/project-...rical-upgrade/
That article doesn't mention the OEM fungible wire from the 2g alternator to the battery wasn't big enough to handle the extra amps. Found that out the hard way when I smelled the magic smoke one night :-(
I replaced that with a much larger cable and an inline fuse. I've learned a lot since then....
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