Examination
1. Remove the center section of the front panel.
2. Disconnect the wires from the overload switch and test light.

3. Check the resistance between terminals 1 and 2. When off, there should be a short circuit between these terminals.
4. Otherwise, replace the switch.
Removal
1. Remove the center section of the front panel.
(The article was copied from here: NissanBook)
2. Disconnect the connectors from the overload switch and test lamp.
3. Loosen the screws, press the button and remove the selector handle.
4. Remove the switch from the latches.
Installation
1. Set the switch.
2. Correct the wiring and put the handle on.
3. Tighten the screws and check the selector lock.
4. Connect the overload switch and test lamp connectors, install the center section.