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 582 of 1188

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

0095-4

DRAFT

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TFFT04036

Step 7.

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

Put pump operator’s panel

FOAM SYSTEM switch to ON position (WP 0004).

While an assistant holds pump

operator’s panel FOAM TANK switch to “A” position (WP 0004), check for 22 to 28 VDC

across wire 2842 (red) from cab power distribution block relay 5, terminals 1 and 5 to a

known good ground.

a.

If 22 to 28 VDC are present at both terminals, replace relay

5 (WP 0402).

b.

If 22 to 28 VDC are present at one but not both terminals, replace cab

power distribution wire harness and block (WP 0441).

c.

If 22 to 28 VDC are not present, go to Step 8.

WARNING

ICON 3

Remove rings, wristwatches, neck chains, and any other jewelry before working

around vehicle.

Jewelry can catch on equipment and cause serious injury.

Jewelry

and tools may short across electrical circuits and cause damage to equipment, or

severe burns or electrical shock to personnel.

Step 8.

While an assistant puts and holds personnel cab FOAM SELECT switch to “A”

position (WP 0004), check for 22 to 28 VDC across wire 2842 (red) from cab power

distribution block relay 5, terminals 1 or 5 to a known good ground.

If 22 to 28 VDC are present, go to Step 10.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION