Alright I got my Alt installed got is tested prior and 100% good. I got it wired all up according to the diagram in a couple post tossed the old harness and meter. I have Zero power. I checked my wires with a volt meter and got 12.4 v on my solenoid but nothing when I try to turn it over. I did have to ground my alt where the bottom bolt holds the alt in place, cause the small bolt I used behind the alt stuck out too far and wouldn't fit. Could my issue be with the ground how I did it? It's a 71 F-250 360cid.

followed this diagram
http://www.fordification.com/galleri.../3Ginstall.jpg

 

I don't think it is a grounding issue. The 3G is physically grounded through the casing, bracket, the water pump, to the block.

You may have popped a fusible link or ya mis-wired the thick Black/yellow wire. I'd pull the alternator harness and Ohm it out to verify continuity.

The harness should look and function as pictured below (ignore the text for the ammeters):

 

dude i cant even read the text on this

 

Also where the yellow and black/yellow wire comes into one, mine has two wires that come out one black/ yellow and one black

 

Dude, you're the first....Click on the image and it will enlarge to 640 x480 - readable.

You mean where it connects to the solenoid? Peel back the wrap and it'll likely be the Blk/yel and Yellow wires or it has an inline fusible link. Sometimes the colorant wears off. Regardless, it needs to be connected to the battery side terminal.

The Y/wh from the 3G also connects to the hot side or looped to the alternator's battery lug. The Gr/r wires need to be connected to each other.

 

its the color man, bright as hell and jagged

 

Increase your screen's resolution. 'You using a "mobile device"?

 

on my PC and Phone its the same, it doesnt help when your color blind either. and no not black and white color blind lol

 

Well I got it working, putting out 14.5 at idle. An a slight squeal on start up and it squeals when I rev it high really fast

 

So what was the problem?

 

i think my mistake was putting the black/yellow wire on the starter side of the solenoid. I took the bolts and washers off the starter and used a wire brush to clean up the connection too.

 

I finally got mine going no noise but others have because of using a single v pulley. If you go to a double v you should get rid of the squeal. Double v puleys are available at auto parts stores, online and the junkyard.

 

correct- the solenoid is an open switch except when you're cranking the engine over, so the black/yellow wire would not have been getting battery voltage.

 

The sequel is from the belt being too loose. Tighten it and it will stop squealing. Doesn't matter if it is a single or double pulley.

 

well i tightened it some more to day and it still squeals.