Wire from alternator on Ford 1920

[tractorgirl93]

Hey all,

I have a Ford 1900. There is a wire on the back of the Alternator that is hanging, dont know how it came off. I dont know where it goes? I am schematic illiterate. Can some one [ nicely, no remarks please] tell me where to hook it up to?

Thanks

 

[bigdeano]

It looks like it's a standard 3 wire alternator from doing some googling. There should be 3 wires hooked to the back of the alternator. One thick one from the battery or starter hooks to a 1/4 inch stud. Two thinner ones hook to a plastic plug which plugs into the alternator. Can you tell which one it is?

 

[tractorgirl93]

Thanks for your reply ! Other than the battery cable, there is only one other wire.

 

[bigdeano]

It must go somewhere that has 12 volts when the ignition switch is on. If it's hanging from the alternator plug can you tell from the length where it might go? Sorry I'm not familiar with your tractor model. Maybe someone else will chime in.

 

[tractorgirl93]

The only place i can think of is behind the instrument panel. but I dont know where. Ill take a picture of that.

Looked behind the instrument, everything has a wire to it.

 

[jaotguy]

pic's please ... this was probably a "conversion" and could be any alternator ...

do you have an idiot charge light or charging gauge on the dash ? ( conversion kits could have added them )

be patient , someone will identify the wire , once we have pictures ....

 

[Scrambler82]

We can guess and guess but a picture is a thousand words, I have heard that before !

A picture of the back of the alternator, close... and maybe one of the connector ?

 

[jaotguy]

and please , "wipe/clean" the hanging wire and let us know the color ... it helps identify the circuit it belongs to .

 

[tractorgirl93]

The wire is red. Looking through the diagrams, I believe it goes to the starter.

I do not have a charging light, most of the lights do not work anymore. I wait for the glow plug to heat up before I start.

 

[bigdeano]

The large post on the alternator that is labeled "BAT" looks like it has no wire attached to it. If the large red wire came off there it probably does go the starter. From there it goes to the battery. Disconnect the negative terminal on the battery so you don't get a nasty short circuit and fire.

It looks like all you have to do is reattach the wire to the "BAT" terminal on the alternator. I thought from your original post the wire was on the alternator but came loose at the other end.

 

[tractorgirl93]

Thanks Bigdeano, The wire was attatched to the alt, but didnt go anywhere. I have no idea how and why it became disconnected.

 

[jaotguy]

that big red wire (about the size of a large milk shake drinking straw, should connect to the BATT terminal on the alternator and connect to the POSITIVE post on the battery ... or to the really big wire on the top of the starter ( that wire goes back to the positive post on the battery too)


go to a HD / Lowes / or store that has an electrical department ... ask for "ring connectors" and buy the "yellow" ones ...

put new connectors on the ends of your hanging wire and re-connect them ....

 

[tractorgirl93]

Thanks Jaotguy, yes, the battery goes to the Alt, this is another red wire, not as big as the batt,

 

[Xfaxman]

Hey all,

I have a Ford 1900. There is a wire on the back of the Alternator that is hanging, dont know how it came off. I dont know where it goes? I am schematic illiterate. Can some one [ nicely, no remarks please] tell me where to hook it up to?

Thanks

Thanks Bigdeano, The wire was attatched to the alt, but didnt go anywhere. I have no idea how and why it became disconnected.

So you removed the hanging wire before you took the picture?

Thanks Jaotguy, yes, the battery goes to the Alt, this is another red wire, not as big as the batt,

Right now there are no wires that show in the picture, going to the alternator.

Can you take another picture not quite as close, straight on showing all of the back of the alternator.

 

[skyhook]

Looking at that picture of the alt,
it seems as if there was never a wire on the "bat" terminal, the bolt looks awfully rusted.
Without that wire going to the battery, I don't see how it would charge.
As faxman stated, I don't see any wires also.

 

[Scrambler82]

We are talking about a replacement alternator correct ?

Did you redo the complete electrical system ?

As stated we need a clearer picture, showing all the wiring and a close up of the end of the "Hanging Wire" ?

Who is the manufacture of alternator ?

What year is it ?

Thks

 

[jaotguy]

pic shows GM alt

 

[skyhook]

We are talking about a replacement alternator correct ?



Thks

Where did you get this idea?
From what I read, there was no talk about a "replacement", correct?

 

[tractorgirl93]

View attachment IMG.pdf The schematics



The alternator is not the original.

Xfaxman.....Yes, Sorry but I did take the picture after I removed the wire. I removed it a while ago. The tractor will start but not with out a jump.

Scrambler82...No, I never redid the complete electrical system. Just fixed things when they were getting ready to break.

The battery wire is going straight to the starter

 

[jaotguy]

just run a #8 wire from the BATT post on the alternator back to the same post (+) on the battery that the starter is attached to .... once above 1200- 1400 RPM , the alternator should kick in and charge the battery .... test by hooking up a volt meter ( if you have one ) to the posts on the battery .. it should jump above 13 volts when the alternator starts making power ....