DRAFT
TM 5-4210-249-13&P-1
0123
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TFFT03883
Step 5.
Open pump operator's panel housing (WP 0325). Disconnect water level probe
connector from pump operator's panel water level gauge connector. With a test lead
set, check for continuity across sensor electrodes as follows. Check for continuity from
water level probe connector, terminal 2 to tip of 1/4 sensor electrode. Note reading.
Check for continuity from water level probe connector, terminal 3 to tip of 1/2 sensor
electrode. Note reading. Check for continuity from water level probe connector,
terminal 4 to tip of 3/4 sensor electrode. Note reading. Check for continuity from water
level probe connector, terminal 5 to tip of full sensor electrode. Note reading. Check for
continuity from water level probe connector, terminal 6 to tip of ground sensor electrode.
Note reading.
If there is no continuity across any sensor electrode, replace water level
probe (WP 0297).
Step 6.
Check for 12K to 16K ohms resistance between water level probe connector, terminals
1 and 2. Note reading. Repeat resistance checks for terminals 1 and 3, 1 and 4, and 1
and 5.
If resistance is not between 12K and 16K ohms for any sensor electrode,
replace water level probe (WP 0297).
Step 7.
Check for greater than 1M ohms resistance between water level probe connector,
terminals 6 and 2. Note reading. Repeat resistance checks for terminals 6 and 3,
6 and 4, and 6 and 5.
If resistance is less than 1M ohms for any sensor electrodes, replace water
level probe (WP 0297).
0123-4
