TM-5-4210-249-13-P-2

TACTICAL FIRE FIGHTING TRUCK (TFF) MODEL M1142

TECHNICAL MANUAL; OPERATOR’S AND FIELD LEVEL MAINTENANCE MANUAL WITH REPAIR PARTS AND SPECIAL TOOLS LIST (INCLUDING DEPOT REPAIR PARTS AND SPECIAL TOOLS); PART 2 OF 4

TM-5-4210-249-13-P-2 - Page 120 of 1452

TM 5-4210-249-13&P-2

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DRAFT

0130

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FOLLOW-ON MAINTENANCE

Remove wheel chocks (TM 9-2320-347-10)

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END OF WORK PACKAGE

TFFT02983

Step 68.

Install circuit breaker FS 11 (WP 0401).

Remove relay 4 (WP 0402).

With a test lead

set, check for continuity across cab power distribution wire harness wire 1186 (gray)

from relay 4 connector, terminal 4 to cab instrument panel wire harness cab power

distribution wire harness connector, terminal 15.

If there is no continuity, repair wire 1186 in cab power distribution wire

harness if repairable (TM 9-2320-325-14&P), or replace cab power

distribution wire harness and block (WP 0441)

WARNING

ICON 3

Remove rings, wristwatches, neck chains, and any other jewelry before working

around vehicle.

Jewelry can catch on equipment and cause serious injury.

Jewelry

and tools may short across electrical circuits and cause damage to equipment, or

severe burns or electrical shock to personnel.

Step 69.

Turn battery disconnect switch to ON position (WP 0007).

Check for 22 to 28 VDC

between wire 2345 (red) at cab power distribution wire harness relay 4 connector,

terminal 3 and a known good ground.

a.

If 22 to 28 VDC are present, replace relay 4 (WP 0402).

b.

If 22 to 28 VDC are not present, replace cab power distribution wire

harness and block (WP 0441).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION