JUNCTION BOX - TEST/REPLACE

TM 5-4930-233-14

TM 4930-14/1

WIRING HARNESS OR TRAILER ELECTRICAL

4-53. JUNCTION BOX - TEST/REPLACE

This task covers:

Test

b. Removal

Installation

INITIAL SET-UP:

General Safety Instructions

Equipment Condition

Air Tank Removed (para 4-52)

WARNING

Tools

General Mechanics Tool Box

When working on electrical compo-

(Section III, Item 1, App B)

nents remove all jewelry, dogtags,

and metal items to avoid electrical

shock and burns.

Test

(1)

Open junction box (1) by removing screws (2) and sliding latches (3) out of the way.

NOTE

The lube and service unit trailer can operate on 12 Vdc (commercial mode) or 24

Vdc (military mode). Do steps 2 through 6 if malfunction occurred while operating in

military mode. Go to step 7 for testing commercial mode.

(2)

Hook up intervehicular cable at military style (24 Vdc) vehicle.

(3)

Turn on towing vehicle headlights, and clearance lights. Step on brake.

(4)

See the power output chart (Table 4-6) and junction box wiring diagram and check power outputs

for military mode only.

4-154