REAR MARKER LIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550271

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 at

nonoperating rear 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 22 to 28 vdc are not present,

perform Steps (6) and (7) below

and repair wire 1012B (see

schematic, Fig FO-1.1) or replace

rear side marker light wire harness

(b) If 22 to 28 vdc are present,

wire 1012B is OK. Perform Steps

(6) through (8) below and go to Step

3 of this Fault.

(6) Turn off lights.

(7) Turn OFF ENGINE switch.

(8) Connect wire 1012B to rear side marker

light connector.

CONTINUITY TEST

(1) Remove two screws and lens cover.

(2) Set multimeter select switch to ohms.

(3) Is there continuity between rear side

marker light ground contact and a

known good ground?

(a) If there is no continuity,

repair wire 1435 (see schematic,

Fig FO-1.1) or replace rear side

marker light wire harness

(b) If there is continuity, replace rear

side marker light assembly (Para

4-27.1).

(4) Install lens cover and two screws.

4-118.11