6.5 Alternator question

Is this prong on the 6.5 isolated ground or a positive terminal?

https://hosting.photobucket.com/imag..._IMG_3465.HEIC

Positive charge lug off the rectifier. The alternator is grounded through the housing.

Quote:

---

Originally Posted by DmaxMaverick

Positive charge lug off the rectifier. The alternator is grounded through the housing.

---

Ok thanks! Does the 6.5 tach reading come from the alternator?

Yes. It also makes the pulley size (crank and alt.) critical to accuracy.

Quote:

---

Originally Posted by DmaxMaverick

Yes. It also makes the pulley size (crank and alt.) critical to accuracy.

---

Ok. The 4 wires that are on the connector, what do they do? Color codes?

I can't help without a specific application and a diagram, and I have neither. Typically, the alternators are either 2 or 4 wire connectors (4 place, with only 2 used, in the 2-wire). One is the field exciter, the others are for voltage regulation and the tach (if the correct application). I don't know the colors, but I bet google does.