TM 9-2330-227-14&P
ELECTRICAL SYSTEM - CONTINUED
INSIDE DOMELIGHTS appear on the ceiling inside the van body. A master switch controls power to all
of them, and each domelight has its own independent switch. The lights can be either on, off, or in
a blackout condition.
NOTE
The diagrams for each 24-volt system configuration of the M146 model can be found on
110-VOLT SYSTEM - EARLY M146
The 110-volt system has a single wire harness which leads from the outside receptacle through two
junction boxes to the lights and inside receptacles.
JUNCTION BOXES on the front wall contain two main circuit breakers and four branch circuit breakers.
There is a separate circuit for each group of wall receptacles and one for the lights. There is one
circuit not used.
WALL RECEPTACLES are located on the right and left wall of the van body at the top. Eight
receptacles appear on each side. Separate circuit breakers control the right and left side
receptacles.
DOMELIGHTS are mounted to the ceiling. There are two rows of four lights including one blackout
light for a total of eight domelights. The lights automatically come on when the power source is
connected. When either blackout switch is on, the door switches automatically shut off the
domelights and turn on the blackout domelight when any door is opened.
110-VOLT SYSTEM - LATE M146
JUNCTION BOXES on the front wall contain two main circuit breakers and four branch circuit breakers.
There is a separate circuit for each group of wall receptacles and one for the lights. There is one
circuit not used.
WALL RECEPTACLES are located on the right and left wall of the van body at the top. Ten receptacles
appear on each side. Separate circuit breakers control the right and left side receptacles.
DOMELIGHTS are mounted to the ceiling. There are two rows of four lights with a blackout light in the
middle for a total of nine domelights. The lights are controlled by on/off switches and blackout wall
and door switches. When the blackout switch is on, the door switches automatically shut off the
domelights and turn on the blackout domelight when either door is opened.
NOTE
The diagrams for each 110-volt system configuration of the M146 Model can be found on