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 160 of 1452

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

0131-40

DRAFT

0131

TFFT03631

NOTE

For Step 51 it will be necessary to check both wires 1364 (white) at POWERED

EQUIPMENT RACK LIFT switch.

Both wires carry same amperage but are used in

reversed voltage at switch to allow equipment ladder rack to raise and lower.

Step 51.

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

Remove relay P10

(WP 0402).

With a test lead set, check for continuity across wire 1364 (white) from

relay P10, terminal 30 to POWERED EQUIPMENT RACK LIFT switch, connector and

connector.

a.

If there is continuity across both wires 1364, go to Step 54.

b.

If there is no continuity across one wire 1364 at POWERED

EQUIPMENT RACK LIFT switch, repair wire 1364 in ladder rack

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

ladder rack control wire harness (WP 0449).

c.

If there is no continuity across both wires 1364 at POWERED

EQUIPMENT RACK LIFT switch, go to Step 52.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION