OSS DISABLES FUNCTIONS (CONT). -726250805

TM 9-2320-364-34-1

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 result.

NOTE

Disconnected white wires should not be

in contact.

Steps (4) through (14) are for crane

junction box.

White wires should have 0 vdc present when

OSS is not activated. Faulty wire is

shorted to a wire with 22 to 28 vdc

present.

CONTINUITY TEST

(1) Check disconnected harness

connector for continuity between

terminals B and A.

(a) If continuity is present, replace

harness (Para 6-29).

(b) If continuity is not present, go

to Step (2) below.

(2) Check disconnected harness

connector for continuity between

terminals B and D.

(a) If continuity is present,

replace harness (Para 6-29).

(b) If continuity is not present, go

to Step (3) below.

(3) Connect harness connector to OSS

box.

(4) Set multimeter to volts dc.

(5) Connect multimeter negative lead

to known good ground.

(6) Connect multimeter positive lead

to one of the four white wires

disconnected from terminal 18 with

ENGINE switch OFF

(TM 9-2320-364-10).

(7) Turn ON ENGINE switch.

(8) Set WINCH/CRANE switch to

CRANE position.

(9) Set hydraulic selector switch to

CRANE/SRW position.

(10) Set crane main POWER switch to

ON position.

(11) Repeat Steps (6) through (10) until

wire with 22 to 28 vdc present is

found. Repair white wire (Fig 2-7)

with 22 to 28 vdc present or replace

harness after completing

Steps (12) through (14) below.

(12) Set crane main power switch to OFF

position.

(13) Set hydraulic selector switch to OFF

position.

(14) Turn OFF ENGINE switch.

2-721