CHAPTER 4 ELECTRICAL SYSTEM

TM 5-4120-394-BD

CHAPTER 4

ELECTRICAL SYSTEM

BDAR FIXES SHALL BE USED ONLY IN COMBAT OR FOR

TRAINING AT THE DISCRETION OF THE COMMANDER

(AUTHORIZED TRAINING FIXES ARE LISTED IN APPENDIX E) IN

EITHER CASE DAMAGES SHALL BE REPAIRED BY STANDARD

PROCEDURES AS SOON AS PRACTICABLE.

Section I. INTRODUCTION

4-1. General. Environmental Control Units (ECU) contain many basic electrical components which can be repaired or by-

passed or replaced. Switches can be cannibalized or replaced, wire can be spliced or soldered, fuses can be shorted, and

other repairs are sometimes possible. Care must be taken to avoid contact with live circuits since some units draw

enough current to cause severe injury. Fan meters are not expediently repairable if damaged or worn out and should be

replaced or cannibalized.

4-2. BDAR Procedure Index.

Damage

Para

Switch Defective .............................................................................................................................................. 4-5

Fuse or Circuit Breaker Failure ....................................................................................................................... 4-6

Wiring Harness Damage ................................................................................................................................. 4-8

Connector Pin Damaged (Broken or Missing) ................................................................................................. 4-9

Wires Broken ................................................................................................................................................... 4-10

4-1