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 722 of 1452

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

0178-4

DRAFT

0178

TFFT03979

NOTE

Rear step buzzer indicator and audio alarm connectors are in contact with two separate

wire harnesses.

Wire 1647 (brown) originates at cab power distribution wire harness and

introduces power into the circuit.

Wire 1614 (brown) originates at main wire harness and

leads to rear step buzzer push button assembly through the driver side body wire harness.

Circuit is complete when rear step buzzer push button assembly is pushed, applying a

ground to circuit.

Step 4.

Install circuit breaker 7 (WP 0398).

Remove personnel cab instrument panel

E (WP 0311).

Disconnect rear step buzzer audio alarm connector.

Turn battery

disconnect switch to ON position (WP 0007).

With a test lead set, check for 22 to 28

VDC between cab power distribution wire harness wire 1647 (brown) at rear step

buzzer audio alarm connector, terminal B and a known good ground.

If 22 to 28 VDC are not present, repair wire 1647 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).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION