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 223 of 1452

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

0139-5

DRAFT

0139

TFFT03741

Step 5.

Put cab GENERATOR PTO switch to OFF position (WP 0004). Shut off engine

(TM 9-2320-347-10).

Disconnect main wire harness PTO pressure switch connector.

With a test lead set, check for 22 to 28 VDC between main wire harness wire 2700 (red)

at PTO pressure switch connector, terminal A and a known good ground.

If 22 to 28 VDC are not present, go to Step 8.

Step 6.

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

Disconnect cab instrument

panel wire harness GENERATOR PTO ENGAGED indicator wire 1677 (white).

With a

test lead set, check for continuity across wire 1677 (white) from main wire harness PTO

pressure switch connector, terminal B to cab instrument panel wire harness GEN PTO

ENGAGED indicator wire 1677 connector.

If there is continuity, replace PTO pressure switch (WP 0602).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION