Alternator question??

[jmartin99]

I am trying to hook up a brand new engine wiring harness in a '72 Challenger with 340. According to the manual, there are three wires that go to the alternator. I have identified the three wires, the battery wire has a ring terminal on the end of it to be mounted on the stud on the back of the alt. The other two have female spade terminals The problem is I think the alternator I have is missing one of the male spade terminals to connect the wire to. Am I correct?   



Thanks!

Jeff 

[anlauto]

Yes, that's the wrong alternator. That is what they call a single field alternator used PRE-1970

[burdar]

Also, when did the "square back" alternator start showing up?  My 73 has a square back.  Did 72 use one as well?

[Topcat]

[jmartin99]

I went to this alternator because the one specified for a 72 Challenger would not fit. The 340 has aluminum heads on it and this alternator barely clears the head.  Can I add the terminal tab under the existing screw and make it work properly? 

Thanks! 

Jeff

[jmartin99]

So with the new wiring harness, the wires that extend to the alternator has a black wire with a ring terminal that I am sure attaches to the Bat stud on the alternator. There is also a purple wire, a green wire and a tan wire. which two of these go to the alternator and does the third wire go to the A/C compressor? The alternator has terminals "FLD" and  "GRD", which colored wires go to these? 

Thanks! 

Jeff

[burdar]

Look at the diagram "Topcat" posted.  You should have blue and green wires that connect to the alternator. Blue= field+...Green= field- but it will function the same if they are hooked up backwards.  The purple wire should have a rubber 90degree boot on it.  That's for the temp sender.  The brown wire goes to the electric washer motor if you have electric washers.  If you have a foot pump, the brown wire gets wrapped up around the three pronged clip attached to the alternator.

[jmartin99]

Hmmm...I see Topcats post, but it is empty...no diagram or text at all!

Thanks! This helps a lot!!!

Jeff 

[HP_Cuda]

Make sure you have the right spacers for the alternator.

If you don't you can crack the back half of the alternator off by over tightening it.

Don't ask...

[Topcat]

Hmmm...I see Topcats post, but it is empty...no diagram or text at all!

Thanks! This helps a lot!!!

Jeff 

If you don't see the picture yet I posted, send me a PM with your e-mail. 

[Moparal]

Make sure you have the right spacers for the alternator.

If you don't you can crack the back half of the alternator off by over tightening it.

Don't ask...

   a bit of hindsight going on in your testimony

[HP_Cuda]

Seen that travel commercial with Captain Obvious lately???

 

[jmartin99]

So from what has been said... Will it work if I connect the black wire to the Bat Terminal, the Blue wire to the Field terminal, A ground wire from the block to the Grd Terminal and leave the green wire disconnected?

Just trying to figure out how to hook this thing up!

Jeff

[tman]

I think its better to get the correct alternator with 2 fields. 

[Chryco Psycho]

Yes that alt will work with a second tab added behind the screw as long as the second terminal has no connection to ground & is isolated