What size alternator?
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Post Fiend
Joined: Mar 2003
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From: Sarnia, Ontario, CANADA!
What size alternator?
I think I may have to replace my alternator in my truck. I was just wondering what size alternator I should get. My truck has a 5.0 L V8 (EFI). It does not have air conditioning. It is just a barebones truck with no high current pulling accesories. It does have a 1000 cold cranking amp battery.
I went to Ford and they said they had a 60 amp alternator listed for my truck. Is this the right one? Also, the voltage regulator is external on 85 F150's right? Because that makes a big difference.
Thanks
-Matt
I went to Ford and they said they had a 60 amp alternator listed for my truck. Is this the right one? Also, the voltage regulator is external on 85 F150's right? Because that makes a big difference.
Thanks
-Matt
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
For an 85, an internal regulator alternator is possible. Quick way to tell, an external regulator alternator has 3 wires going to it, and the regulator is on the pass. fender.
You can just see it in this picture, it's the grey box on the fender, between the solenoid and battery.
For an alternator, a good rule of thumb when replacing is to get the biggest one you can without having to modify any wiring.
You can just see it in this picture, it's the grey box on the fender, between the solenoid and battery.
For an alternator, a good rule of thumb when replacing is to get the biggest one you can without having to modify any wiring.
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
Nothing short of the finest in anti-theft technology here... 
The internal regulator alternator was a running change, I have seen 85's with and without them.
My F250, well, it's an 82 cab on an 86 chassis, and I just plugged the internal reg. alt. harness into the 82 cab harness... So, it's really possible for any 80-86 to have an internaly regulated alternator.
The internal regulator alternator was a running change, I have seen 85's with and without them.
My F250, well, it's an 82 cab on an 86 chassis, and I just plugged the internal reg. alt. harness into the 82 cab harness... So, it's really possible for any 80-86 to have an internaly regulated alternator.
Thread Starter
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Post Fiend
Joined: Mar 2003
Posts: 14,413
Likes: 3
From: Sarnia, Ontario, CANADA!
Thanks for your help guys. I was asking the question because I thought I would need a new one but I guess I don't. I fixed my problem. See here ---> https://www.ford-trucks.com/forums/s...hreadid=206636
-Matt
P.S. I should have guessed on a truck this old that it would be the wiring!
-Matt
P.S. I should have guessed on a truck this old that it would be the wiring!
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mcampbell545
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Oct 15, 2013 04:37 AM
