Where do i trace my orange/blue wire to from alternator? i have new alternator and batteries, but won't charge. will charge if i jump orange/blue to positive post. Any good suggestions? Thanks Phil

The orange/light blue wire is connected to the red (positive) wire from the battery, through a fusible link (or two links depending on engine size) to pin #3 of the voltage regulator at the alternator. The fusible link will be in the harness so you may have to disassemble the harness. The fusible link is probably blown. This was probably caused by the defective alternator/regulator assembly.

According to my diagram, it appears to go from the red batt wire to a gray 12 gauge fusible link, into a brown 18 gauge link, then turns into the orange/light blue wire and to the alternator.

(A fusible link is a piece of wire that acts like a fuse and will burn out, opening the circuit when amperage above its rating. This protects the circuit and lessens the chance of fire).

Good luck, please ask if you need more info.