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 288 of 1452

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

0150-2

DRAFT

0150

TFFT03829

Step 1.

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

Turn Service Drive Lights

On (TM 9-2320-347-10).

Put EMERG MASTER switch to ON position (WP 0004).

Put

siren control selector switch to WAIL, YELP, and HI-LO, one position at a

time (WP 0004).

Check if siren operates.

If siren operates in at least one mode, but not all positions, replace siren

control (WP 0341).

NOTE

Integrated siren control amplifier will produce a faint audible signal which can be heard at

siren control if siren speaker or wiring leading to speaker fails.

Step 2.

Put siren control selector switch to WAIL, YELP, and HI-LO (WP 0004).

Check if siren

output can be heard at siren control.

If siren is heard faintly at siren control, go to Step 11.

Step 3.

Check if siren speaker operates, but with distortion.

If siren operates with distortion, cut main wire harness wires 1052 (brown),

and 1053 (yellow) at siren speaker connector and swap wire connection, if

distortion persists, replace siren speaker (WP 0428).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION