FRONT SIDE MARKER LIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550429

TM 9-2330-385-14

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical

circuits, a direct short may result. Damage to equipment, injury, or death to personnel may occur.

VOLTAGE TEST

(1) Disconnect wire 1012B from

nonoperating front side marker light.

(2) Set multimeter select switch to volts dc.

(3) Connect positive (+) multimeter lead

to wire 1012B.

(4) Connect negative (- ) multimeter lead

to a known good ground.

(5) While assistant turns ON ENGINE

switch and turns on lights, observe

multimeter (TM 9-2320-364-10).

(a) If there are not 10 to 14 vdc

present, perform Steps (6) and

(7) below and repair wire

1012B (see schematic Fig FO-1.1)

or replace trailer main wire harness

(b) If there are 10 to 14 vdc present,

wire 1012B is OK. Perform

Steps (7) through (10) below and

go to Step 2 of this fault.

(6) Turn of lights.

(7) Turn OFF ENGINE switch.

(8) Connect wire 1012B to front side

marker light.