TM 5-3825-270-23&P
0048
LOW TANK
LEVEL SWITCH
HARNESS
PIN 2
CONNECTOR
PIN 1
Figure 1. Low Tank Level Switch Harness Connector - Step 1.
5.
Connect black multimeter probe to pin 2 on low tank level switch harness connector.
6.
Note multimeter reading.
7.
Reconnect low tank level switch harness connector to low tank level switch. (WP 0189)
CONDITION/INDICATION
Are less than 200 ohms measured between pin 1 and pin 2 on low tank level switch harness connector?
DECISION
No - Go to step 2. (Step 2 - Are 22 to 28 VDC measured on black wire at interconnect terminal strip, terminal
12?)
Yes - Low tank level switch is stuck in closed position. Replace low tank level switch. (WP 0189) Verify problem
is solved. (Step 3 - Does WATER LEVEL LOW indicator stay illuminated?)
STEP 2
Are 22 to 28 VDC measured on black wire at interconnect terminal strip, terminal 12?
WARNING
Remove all jewelry such as rings, ID tags, bracelets, etc., prior to working on or around
vehicle. Jewelry and tools can catch on equipment, contact positive electrical circuits, and
cause a direct short, severe burns, or electrical shock. Failure to comply may result in injury
or death to personnel.
NOTE
This test is checking for a short to power in the WATER LEVEL LOW indicator circuit. Wire
isolation may be necessary to detect and locate short in wiring.
1.
Remove six control panel faceplate screws.
