Alternator question
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Alternator question
I need to do some work on my truck that requires removing the alternator. As long as I am doing that, I wanted to know if there is a way to tell if the pigtail is the updated one or not. Also, I wanted to be sure, it is recommended to put electrical grease on the plugs before reconnecting, correct?
pedant
Joined: Jan 2008
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From: EXTREME southwest CT
The Ford TSB states that the pigtail should be replaced any time the alternator is changed.
If you are replacing the alternator you should put a NEW "fire plug".
You can tell if it has been changed because it will only be crimped on.
Yes, use grease to keep the prongs from corroding and melting the plug.
There are nine manufacturers that make the replacement plug that I know of, but I'm on my phone, so....
If you are replacing the alternator you should put a NEW "fire plug".
You can tell if it has been changed because it will only be crimped on.
Yes, use grease to keep the prongs from corroding and melting the plug.
There are nine manufacturers that make the replacement plug that I know of, but I'm on my phone, so....
Logistics Pro
Joined: Sep 2011
Posts: 4,491
Likes: 26
From: Algona,WA
The Ford TSB states that the pigtail should be replaced any time the alternator is changed.
If you are replacing the alternator you should put a NEW "fire plug".
You can tell if it has been changed because it will only be crimped on.
Yes, use grease to keep the prongs from corroding and melting the plug.
There are nine manufacturers that make the replacement plug that I know of, but I'm on my phone, so....
Borg-Warner PT-780
Standard Motor Products S-542
Power Plug 4628011
KEM Parts 350-220
Pico 5711
Dorman 85123
Motormite 08622
NAPA VRA400
If you are replacing the alternator you should put a NEW "fire plug".
You can tell if it has been changed because it will only be crimped on.
Yes, use grease to keep the prongs from corroding and melting the plug.
There are nine manufacturers that make the replacement plug that I know of, but I'm on my phone, so....
Borg-Warner PT-780
Standard Motor Products S-542
Power Plug 4628011
KEM Parts 350-220
Pico 5711
Dorman 85123
Motormite 08622
NAPA VRA400
Fixed it
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Joined: Jan 2001
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From: Virginia
I need to do some work on my truck that requires removing the alternator. As long as I am doing that, I wanted to know if there is a way to tell if the pigtail is the updated one or not. Also, I wanted to be sure, it is recommended to put electrical grease on the plugs before reconnecting, correct?
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'86 F250 6.9l. I assumed that it is a 2G alternator, otherwise I don't know what it is. Are the stock alternators on the diesels something other than a 2G? My alternator has that external fan thing.
Last edited by 86-IDI; Jan 10, 2015 at 01:45 PM. Reason: Added info
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From: Virginia
Sure does look like it has the dual plug output like a 2G. My 89 diesel has a relative of the 1G, but it's about 100 amp output. I have the external regulator.
Ford must have though better of it and went back to the 1G style. They also had a ambulance package on these with a very large alternator made by a different company. I think it was up there like 200 amps or something.
My 86 ranger had a 2G on it. After reading all the trouble they had with it, and seeing the price of a rebuilt one, I installed a 86 GM internal regulated alternator on it instead off a Monte Carlo SS. I think it might be a 100 amp unit also.
Ford must have though better of it and went back to the 1G style. They also had a ambulance package on these with a very large alternator made by a different company. I think it was up there like 200 amps or something.
My 86 ranger had a 2G on it. After reading all the trouble they had with it, and seeing the price of a rebuilt one, I installed a 86 GM internal regulated alternator on it instead off a Monte Carlo SS. I think it might be a 100 amp unit also.
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