I apologize if this sounds stupid, but how do you test to "chassis ground" ? I have a lead in DL1 (pin 13) and the other one at any metal piece in the car (door hinge in this case) and I don't hear anything from the multimeter. Same for any other pin in the connector. Am I doing this wrong?
I'm having the exact same issue. I can hear the transfer case actuator engaging and the front axle/driveshaft as well but the diff lock and 4wd lights will not turn off. I'll try your solution with hopes for similar outcome.
do you know if removing the screws for the front ADD plate will leak...