TM 5-3825-270-23&P
0066
4.
Ensure multimeter is set to measure voltage.
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.
5.
Connect red multimeter lead to UPIK harness connector pin L.
PIN L
UPIK HARNESS
CONNECTOR
Figure 8. UPIK Harness Connector Pin L - Step 4.
6.
Connect black multimeter lead to a known good ground.
7.
Note multimeter reading.
CONDITION/INDICATION
Are 22 to 28 VDC measured at UPIK harness connector pin L?
DECISION
No - Replace UPIK harness. (WP 0108) Verify problem is solved. (Step 6 - Does cab control box WATER LEVEL
LOW indicator illuminate?)
Yes - Wiring in cab control box harness is faulty. Replace cab control box wiring harness. (WP 0206) Verify
problem is solved. (Step 6 - Does cab control box WATER LEVEL LOW indicator illuminate?)
STEP 5
Are less than 200 ohms measured from black wire at WATER LEVEL LOW indicator to black wire at cab
control box tachometer?
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.
1.
Connect red multimeter lead to black wire at cab control box WATER LEVEL LOW indicator.