(1) While assistant turns ON ENGINE
switch and turns on lights,
observe rear side and rear marker
lights (TM 9-2320-364-10).
(a) If all rear and rear marker lights
fail to operate, perform Steps (2)
and (3) below and repair wire 1012B
(see schematic, Fig FO-1.1) or
replace trailer main wire harness
(b) If at least one rear or rear
marker light operates, perform
Steps (2) and (3) below and go to
Step 2 of this Fault.
(2) Turn off lights.
(3) Turn OFF ENGINE switch.