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 804 of 1452

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

0184-6

DRAFT

0184

TFFT04756

Step 12.

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

Open rear compartment

heater diagnostic module (WP 0470).

Check for continuity across orange wire from

rear water tank heater relay terminal in water tank heater control box, to rear

compartment heater diagnostic module TANK HEATER TEST SWITCH terminal.

If continuity is not present, replace rear compartment heater diagnostic

module power cord (WP 0361).

Step 13.

While an assistant puts TANK HEATER TEST SWITCH to test position (WP 0004).

Check for continuity across TANK HEATER TEST SWITCH.

a.

If continuity is present, repair wire 2852 in passenger side body wire

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

side body wire harness (WP 0456).

b.

If continuity is not present, replace TANK HEATER TEST

SWITCH (WP 0470).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION