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 483 of 1188

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

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DRAFT

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TFFT04436

Step 3.

With a test lead set, check for continuity across wire 1966 from pump operator’s panel

pressure governor 12-terminal connector, terminal 1 to ECU connector, terminal 25.

If continuity is not present, repair wire 1966 in pump operator’s panel wire

harness if repairable (TM 9-2320-325-14&P), or replace pump operator’s

panel wire harness (WP 0459).

Step 4.

Reconnect pump operator’s panel wire harness ECU wire harness connector.

Turn

battery disconnect switch to ON position (WP 0007). Start water pump

engine (WP 0022).

With a test lead set, check for voltage fluctuation of 0 to 5 VDC at

wire 1966 from pump operator’s panel pressure governor 12-terminal connector,

terminal 1 to a known good ground.

a.

If steady 5 VDC are present, replace pump operator’s panel pressure

governor control panel (WP 0332).

b.

If steady 5 VDC are not present, replace water pump engine

ECU (WP 0226).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION