well i bought a new alernator an ragulator an put them on but the alternator still aint chargeing an so while the truck was off i checked my hot n ground wires on the regulator plug an my green n red wire on the I termenal is a ground but when the truck is running it also is hot the light is dim on the tester an i dont have no volts running to the feild terminal on the back of the alternator but i thought the feild termenal was suppose to but out volts while the truck is running but the feild termenal aint got a ground or a hot so i dont know whats wrong can i get some help please?

 

wiring of the regulator termenal can yall tell me if this is right

I termanal : green an red wire runs into some plug that runs through the firewall

A termanal : yellow wire thats hot running to the fusable link an to the hot post on the alternator an out that same fusable link it runs to the hot side of the cillinoid**

S termanal : white wire running to ground on back of the alternator an out that same plug runs another white wire thats runs to the same plug as the green an red wire up through the fire wall

F termanal : is a orange wire running to the black field termanal on the back of the alternator is this right?

 

Welcome to FTE & this forum !

Here's a diagram

Btw, that part is called a Solenoid or better yet "starter relay".

no cillinoid

 

well i have a manual choke an my wireing looks nothing like that an there is four plugs on the regulator that shows only 3 an what runs to the field termanal?

 

This is the basic Ford charging system but ,
You didn't mention what year truck you have ?

 

i have a 1978 ford F-100 302 V8

 

i dont have no capacitor on my regulator either

 

Users can edit their own posts up to an hour to add or remove content. The edit button is on the bottom right of the post you wish to edit.

If you have gauges.
That diagram I provided applies to your truck.

Anything other than what you see in the illustration is not original

 

well u take that capacitor off the side of that regulator an that is what mine looks like i have mine hooked up like that thats what my alternator looks like but i dont have nothing connected to the stator on the alternator my idiot light has gone off now but when i take the negitive side top post off the battery the truck still cuts off so the alternator cant be chargeing

 

removing the battery cables with an engine running can toast an alternator.
You have probably blown some diodes from doing that.

That old mechanics trick was back in the days of GENERATORS to "excite" the charging circuit..as generators were DC .......It isn NOT recommended people do this with alternator systems AC.

You can check for charging by just revving the engine up...... with a multimeter attached to the battery to see increased voltage.

 

so pretty much i need to take it to advanced auto an see if its chargeing?

 

Well know you do..Remove the alt and VR and they can bench test them.

That way you know you have good parts for "In-truck" tests.

 

ahhh they can test that volt regulator to i didnt know that thanks for the help my friend well im gonna go out here an start takeing it off

 

it is fixed now thank you Mil1ion for your help advanced auto gave me a regulator that didnt work

 

Zoom..Zoom !