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WATER TANK DRAIN VALVE DOES NOT OPERATE WHEN SELECTED - Continued
WATER TANK DRAIN VALVE DOES NOT OPERATE WHEN SELECTED - Continued

Maintenance Manual For Tactical Fire Fighting Truck (Tfft) Model M1142 - 1 Page Navigation
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DRAFT
TM 5-4210-249-13&P-1
0122
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TFFT03624
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 9.
Turn battery disconnect switch to OFF position (WP 0007). Open pump operator's
panel housing(WP 0325). Turn battery disconnect switch to ON position (WP 0007).
With a test lead set, check for 22 to 28 VDC between pump operator's panel wire
harness wire 2834 (red) at WATER TANK DRAIN switch terminal and a known good
ground.
If 22 to 28 VDC are not present, repair wire 2834 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 10.
Turn battery disconnect switch to OFF position (WP 0007). With a test lead set, check
for continuity across WATER TANK DRAIN switch from terminal wire 2834 (red) to
terminal wire 4053 (brown), while switch is in OPEN position.
a.
If there is continuity, repair wire 4053 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).
b.
If there is no continuity, replace WATER TANK DRAIN
switch (WP 0337).
0122-10


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