I recently re-installed the center diff lock switch on my 97 FZJ80 and noticed that it no longer engages the center diff nor does the diff lock light come on on the dash. I think the problem is either the switch or the wiring harness it plugs into. I’m under the impression that the diff lock switch (when depressed) completes a circuit – which sends a signal to the diff lock actuator and activates the diff lock light on the dash as well. So, to determine if if the harness is broken I’d assume that a small piece of wire put in the correct pins would complete the circuit and activate the diff lock and light ? Assuming this is correct, does anyone know which pins (in the harness) to put the wire into to test the harness thus engaging the actuator and activating the light ? Or perhaps there is a better method ? :dunno: