Alternator not charging

[billr]

Make

Ford

Model

F-150 2WD

Year

1999

Miles

unk

Engine

4.2L V-6

I had to go take a fresh battery to my son last night, meter shows no output at the stud on back of alt. I would like to check out wiring and such before throwing a new alt at it. Please post a schematic of the charging circuit, enough for me to test voltages at the alt connector. DO NOT go to great trouble to provide this, I can probably get by without, but always like to have the best info on hand. Even if it is only a VR/brushes, it will probably get a new alt. VR's are in the $60 range and I know a place to get a good new alt for $73 (delivered).

 

[nickb2]

hope this is what you wanted

Please post a schematic of the charging circuit

But I must ask, knowing, did you modify this?

 

[billr]

It is completely stock. Looking mainly for what is connected to the field/VR so I can make sure alt field is being energized properly. I see the VR has and external "ground to test" terminal, I assume that will bypass the VR and force full output when grounded; but the field supply would have to be OK for that to work.

 

[nickb2]

i cannot fault this logic

It is completely stock. Looking mainly for what is connected to the field/VR so I can make sure alt field is being energized properly. I see the VR has and external "ground to test" terminal, I assume that will bypass the VR and force full output when grounded; but the field supply would have to be OK for that to work.

 

[billr]

Cancel my request. The connector could not be reached with the alt installed, and once it was removed the problem was obvious; the brushes and slip-rings are ruined.

 

[nickb2]

 

[nickb2]

are there rebuild avail for this alt in your area? Cuz I found this. https://www.amazon.ca/dp/B000CFKSBO/ref=au_as_r?_encoding=UTF8&Make=Ford|54&Model=F-150|666&Year=1999|1999&ie=UTF8&newVehicle=1&vehicleId=1&vehicleType=automotive

If you can, is it a stock alt, or one of those RV conversion kind?

 

[nickb2]

slip-rings are ruined.

shyte, I missed that.

Disregard last post if rings are too shot that emory cloth dont work, probably going to need a new unit. But knowing you, you will figure it out.

Again, happy new year to you and you significant other and family.

 

[nickb2]

I remember doing a few of these back when I was apprenticing, but cant for the life of me find anything in my area that actually sells these.

Cool video you can watch on mute.

Of note, it is a valeo alt, but procedure is basically always the same regardless. But where do you find them is the all glowing question. Maybe make your own,

 

[nickb2]

question, in that vid, is that a dublin accent? I am not sure. My french has hard time with accents cuz I dont think it is punjabi or something similar.

 

[billr]

It is a stock (95A?) alt. Yes, I could fabricate and install new slip rings, but I would still need new brushes and would have to make them too, or get a new VR/brush "set". Since the VR/brush seems to be about $40-50 alone, and I can get a whole new alt (including shipping) for about $75, fussing with this one isn't worthwhile for me. Actually, I probably will fuss with it, but as a leisure project. I may turn it into a 3-ph PMAC motor to experiment with.