TM-5-4210-249-13-P-1

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 1 OF 4

TM-5-4210-249-13-P-1 - Page 379 of 1188

TM 5-4210-249-13&P-1

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TFFT 04805

Step 20.

Disconnect crew cab air conditioner thermostatic switch wire 2400 (white) at terminal.

Start crew cab air conditioner (WP 0008).

Put crew cab air conditioner/heater control

panel setting to 45ºF (7ºC) (WP 0009).

With a test lead set, check for 22 to 28 VDC

from crew cab air conditioner thermostatic switch wire 2400 (white) terminal to a known

good ground.

If 22 to 28 VDC are present, replace crew cab air conditioner thermostatic

switch (WP 0206).

Step 21.

Stop crew cab air conditioner (WP 0008).

Shut vehicle engine off (TM 9-2320-347-10).

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

Check for continuity across

wire 2400 (white) from crew cab air conditioner thermostatic switch to relay module

block crew cab air conditioner clutch timer relay terminal.

a.

If there is continuity, replace crew cab air conditioner/heater control

box (WP 0201).

b.

If there is no continuity, repair wire 2400 in body air condenser wire

harness if repairable (TM 9-2320-325-14&P) or replace body air

condenser wire harness (WP 0436).

Step 22.

Open passenger side rear stowage compartment P1 (WP 0010). Check if hydraulic

digital display illuminates (WP 0004).

If hydraulic digital display does not illuminate, troubleshoot Hydraulic

Generator Does Not Operate Properly (WP 0171).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION