I went back outside amd tapped on the computer. I shook all wires. Then i put my meter on my running bqttery and got a steady 11.8 went to my ground and got the samr. Checked my alternator again and had a steady 11.8 then it would drop to OL. Then go back to 11.8.

 

The alternqtor was still wired to battery when i checked the voltage

 

Unhook it from the battery. Your battery may be dead end pulling down the voltage or your alt is shot and you only reading battery voltage.

Test it again, with the two separated.

 

I always thought the cheerleaders were easy?

If the alt tested good, sounds like bad regulator.

 

Maybe I got lucky. I got the "gen" light on my truck with 215,000 miles and the original alternator. So I swapped out the original factory 81-amp alternator for a new 120-amp alternator from Auto Zone. The case was about an inch larger in diameter, but bolted right in (ok; after we swapped out the pulley from the old to the new one). No problems since.

I would suggest while you've got the belt off (especially if it is a high-mileage truck) to swap out the old tension and idler pulley pulleys for new ones (they're not expensive). If they seize, really bad things can happen (as we found out on my buddy's 95 Jeep ZJ).

 

Lots of good info for test alternator
Dave

 

External VR conversion
http://shop.alternatorparts.com/hd-e...ement-kit.html


Dave