TM-9-2320-285-24-1

TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1

TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1985

TM-9-2320-285-24-1 - Page 357 of 987

TM 9-2320-285-24-1

2-31.

LIGHT SYSTEMS MAINTENANCE (CONT)

f. Trailer Lighting Cables (cont).

STEP

LOCATION

ITEM

ACTION

REMARKS

CLEANING

(cont)

WARNING

Compressed air must not exceed 30 psi. Wear safety glasses when drying parts with compressed air.

Failure to do so could cause serious injury to eyes and possible blindness. If you hurt your eyes or if a

foreign object is blown into your eyes, seek medical attention immediately.

c. All other metal

Clean

Use cleaning solvent P-D-680;

parts

dry thoroughly with com-

pressed air or clean cloths

INSPECTION

4

a. Trailer

Check

Use ohmmeter to check

connector

continuity

continuity between

plugs (1)

corresponding terminals.

Replace a defective plug

b. Cables (2 and 7) Inspect

Replace if cracked, broken,

jacket deteriorated, or

otherwise damaged

c. Plug holder (6)

Inspect

Replace if cracked, broken,

or otherwise damaged

d. All other parts

Inspect

Replace if cracked, broken,

distorted, or threads

damaged

INSTALLATION

5

Rear

a. Cables

Install

Insert one trailer connector

hood

(2 and 7)

plug (1) into 12 Volt

enclosure

receptacle; push one cable

(7) plug into 24 Volt

receptacle

b. Cables

Check voltage

Use voltmeter or test lamp to

(2 and 7)

check for proper light

circuit voltage at open end

end of each cable; 12 Volts

for cable (2), 24 Volts for

cable (7)

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