TAILLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550289

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) If connected, disconnect diode

assembly from diode assembly

connector.

(2) Set multimeter select switch to

volts dc.

(3) Connect positive (+) multimeter lead

to diode assembly connector

terminal 12.

(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) through (8)

below and repair wire 1008C (see

schematic Fig FO-1.1) or replace

trailer main wire harness (Para

4--30.1).

(b) If 22 to 28 vdc are present, perform

Steps (6) and (7) below and replace

diode assembly.

(6) Turn off lights.

(7) Turn OFF ENGINE switch.

(8) Connect diode assembly to diode

assembly connector.