TM 5-3825-270-23&P
0047
PIN 1
PIN 2
(WHITE WIRE)
(BLACK WIRE)
HIGH TANK
LEVEL SWITCH
HARNESS
CONNECTOR
Figure 1. High Tank Level Switch Harness Connector - Step 1.
5.
Connect black multimeter probe to pin 1 (white wire) on high tank level switch.
6.
CONDITION/INDICATION
Are less than 200 ohms measured between pin 1 (black wire) and pin 2 (white wire) on high tank level switch
harness connector?
DECISION
No - Go to step 2. (Step 2 - Are 22 to 28 VDC measured on green wire at interconnect terminal strip, terminal
11?)
Yes - High tank level switch is stuck in closed position. Replace high tank level switch. (WP 0187) Verify problem
is solved. (Step 3 - Does WATER LEVEL HIGH indicator stay illuminated?)
STEP 2
Are 22 to 28 VDC measured on green wire at interconnect terminal strip, terminal 11?
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.