3 g alternator
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Tuned
Joined: Apr 2011
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From: Highland CA
3 g alternator
Hey guys I am thinking about upgrading to a 3g alternator on my 70 f250 ranger.it has bean in the 100 out here and my truck is overheating a little In traffic. I have a mark vlll electric fan that I want to install, but a friend told me I need to up grade my alternator.what is involved in this project where do I get the alternator, dose anybody have any pictures or advice on how to tackle this, any help will be appreciated thanks.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
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From: NorCal
Hey guys I am thinking about upgrading to a 3g alternator on my 70 f250 ranger.it has bean in the 100 out here and my truck is overheating a little In traffic. I have a mark vlll electric fan that I want to install, but a friend told me I need to up grade my alternator.what is involved in this project where do I get the alternator, dose anybody have any pictures or advice on how to tackle this, any help will be appreciated thanks.
Post Fiend
Joined: Jun 2003
Posts: 8,209
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From: Black Hills of SD
There are literally dozens of donor cars. Look for a Taurus from the 90s with a V6, most will have a 3G configured right. There are lots of others but I can't find the list right now. If you just google 3G conversion, you will find links to other Ford sites where it is detailed. Personally, I just forget the stock amp gauge since it;s junk anyway and install a volt meter. Then you can one wire the 3g. Make sure you get the plug with it and the center wire is a small plug that stays where youi found it. Then loop the yellow and white "A" wire to the hot lead and the hot lead can go with to Batt + (better to go to the solenoid though. They also recommend using the 175 amp mega fuse and 4 gauge wire for the +. I am running an 80 amp circuit breaker because I don't ask much of my 3G. Just what it takes to fire the points. run the lights and fan.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
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From: NorCal
Lincoln Mark VIII Electric Fan
Here are a couple of articles on installing the Mark VIII fan:
Electric Fan Conversion Using the Notorious Lincoln Mark VIII Fan - FordMuscle
Mark VIII Fan Install in a 1972 Chevy C10 Truck
Electric Fan Conversion Using the Notorious Lincoln Mark VIII Fan - FordMuscle
Mark VIII Fan Install in a 1972 Chevy C10 Truck
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Here's the list of donor vehicles I found
3G 130amp Donor Vehicles:
(1994-95) Ford Mustang 5.0L
(1994-00) Ford Mustang 3.8L
(1994-97) Ford Thunderbird, Mercury Cougar 3.8L
(1990-95) Ford Taurus, Mercury Sable 3.8L
(1993-99) Ford Taurus, Mercury Sable 3.0L
(1995-9 Ford Windstar 3.8L & 3.0L
(1991-94) Lincoln Continental 3.8L
(1992-97) Ford F Series Pickup
(1992-96) Ford E Series Van
3G 130amp Donor Vehicles:
(1994-95) Ford Mustang 5.0L
(1994-00) Ford Mustang 3.8L
(1994-97) Ford Thunderbird, Mercury Cougar 3.8L
(1990-95) Ford Taurus, Mercury Sable 3.8L
(1993-99) Ford Taurus, Mercury Sable 3.0L
(1995-9 Ford Windstar 3.8L & 3.0L
(1991-94) Lincoln Continental 3.8L
(1992-97) Ford F Series Pickup
(1992-96) Ford E Series Van
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Tuned
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From: Highland CA
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Tuned
Joined: Apr 2011
Posts: 298
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From: Highland CA
hey guys i have a problem i just installed a 3g alternator and now my truck wont start when i turn the key nothing, but if i jump a wire from the battery pos to the three wire harnes left from the old wire i took out it starts right up what did i do wrong please help need my truck for work thanks
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Tuned
Joined: Apr 2011
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From: Highland CA
Hio thank for the quick response, now by the picture you posted I understand that you retrofitted the old wire harness to work with the 3g hardness, what about the cable for the battery, did you run the cable from alternator to mega fuse to starter solenoid on battery side.
Fleet Owner
Joined: Dec 2009
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From: NorCal
Hio thank for the quick response, now by the picture you posted I understand that you retrofitted the old wire harness to work with the 3g harness, what about the cable for the battery, did you run the cable from alternator to mega fuse to starter solenoid on battery side.
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Tuned
Joined: Apr 2011
Posts: 298
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From: Highland CA
Thank you Hio, you posted a link about this 3g upgrade wen I first asked, sorry but I am not to good at understanding wiring diagrams thanks again,I know I can depend on you guys.Now I am ready for the mark Vlll electric fan,I will be asking questions again, you guys rock.
