imracing

First Off Ty for input that I can get from you guys
2000 F150 4x4
My battery light is on in the dash I have bench tested both battery and alt they check out good but the light is still on so when I took it to get tested while on the truck its showin no volt output and I have tested two alt

texasedition

Your Alt. is out. I would rec throwing a new battery in also.

Good old Bill

Check for battery voltage at the large terminal of the alternator. Believe its a black/orange wire. Also need 12 volts at orange/lt blue wire. gets its power from fuse 11 on my 02. And last if alternator does in fact charge the wht/blk wire becomes powered up and thus 12 volts is put to both sides of the idiot lite and it goes out. Don't let the last sentence scare you off, its just circuitry stuff controlling the lite in the dash.