Sounds like switches are good if reading open when not depressed and showing continuity or a reading when pushed. Sounds like dash wiring is good when harness is jumped. This points to the motor I think. Make sure you got all your connections fully seated
Yes you need to get the center locked for the diffs to lock. Is the center not locking correct? No light on dash no relay or noises when shifted to low? I assume you are trying this with out your hazard switch in the system? Pull the hazard switch out put the yota jumper back in. I popped a...