flat later style reg/2 field terminal system I'm assuming. eng off/key on see if you have fire at the blue field wire/terminal at the alt and at the blue wire at the reg triangle connector. Turn key off then see if the green field wire has continuity between the end at the alt field and the end at the reg triangle connector. All light bulbs/accessories off, Start it up/fast idle & touch a screwdriver to the back center of the alt & a magnetic pull will you it is charging (at least some). Pull the green field wire off of it's alt field terminal and jump the alt terminal not the wire you removed from the alt terminal to ground for several seconds max & see what you get for voltage at the alt "batt" terminal to ground. This'll tell you if & how good the alt is charging. Holler back. EDIT which everything hooked back up to normal take a jumper wire with alligator clips & touch one end to ground and the other to the reg case to confirm it is grounded (fast idle). You'll see sparks if it ain't or the eng will slow down or you'll see it on the meter