JUNCTION BOXES

TM55-1730-228-13&P

4-11. JUNCTION BOXES - REPAIR

4-11

This task covers:

a. Testing

b. Replacement of Printed Circuit Board

c. Replacement of Relays

d. Replacement of Gasket

e. Replacement of Fuses

INITIAL SETUP

Equipment

Condition

Para

Condition Description

3-17

Battery ground cable

disconnected.

Materials/Parts

Cleaning Solvent (Item 6, Appendix D)

As required

Printed Circuit Board, Part Number 505-02-24-05

Relay, Part Number A314XBX48P-24V/0

Gasket

Fuse, Part Number 71607

Tools Required

Personnel Required

MOS 63G, 1 Mechanic

a. TESTING:

NOTE

It is improbable that a circumstance exists in which it would be necessary to replace an entire junction box. Rather, you

will replace components and wires within the box.

(1) Use the multimeter to check for failed components and/or wires. Consult the electrical schematic for

component/wire identification. Refer to Foldouts (in back of this manual).

(2) Try to determine the cause of the failure. Was the component faulty? Was there a short in the circuit? Was

the circuit overloaded for some reason? and if so; how or why?

(3) Talk with the operator. An alert operator can often give you clues to the failure that can prove invaluable.

Remember, even if he has nothing unusual to report, this is an indicator itself.

GO ON TO NEXT PAGE

4-28