I'm trying to install a 1999 7.3l alternator into a 2000 excursion. I've found either the wiring is different between the 2 or I miss wired it. I have power to the fuse in the cab, but the light doesnt come on. At the alternator I have battery power to one of the 3 wires in the plug.
Can anyone tell me what wires need to be hot on the alternator and when (switched or battery power)?
Wiring diagrams welcome

 

Here's the 1999 charging system wiring diagram (single alternator):



Chris

 

Thats weird. I have power at fuse 29, but I have 2 lg/r wires and only one of them is hot.

I guess I could run switched power to the other one and see if I get charging.