Service receptacle blackout switch provides blackout control of each service receptacle
circuit independent of the main blackout circuit switch.
Door operared blackout switch turns off the ceiling light and service receptacle circuits
when the van door is opened.
Heater thermostats control the output temperature of the van heaters.
Hydraulic lift gate auxiliary pump switch (M291A2D) controls the ON or OFF
operation of the auxiliary hydraulic pump used to power lift gate when the vehicle is
connected to an external electrical supply source.
Emergency light switch controls operation of the 24-volt emergency light which is
powered from vehicle batteries.
Main blackout circuit switch is used to control the electrical system blackout circuits.
In the ON position, the switch connects the blackout relay in the ceiling light and
service receptacle circuits so that the circuits are turned off when the doors are