TM 5-3825-270-23&P
0057
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 J.
UPIK HARNESS
CONNECTOR
PIN J
Figure 7. UPIK Harness Connector Pin J - Step 5.
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 J?
DECISION
No - Wiring in water distributor UPIK harness is faulty. Replace UPIK harness. (WP 0108) Verify problem is
solved. (Step 8 - Does cab control box ENGINE OFF/BATTERY DRAIN indicator illuminate?)
Yes - Wiring in cab control box harness is faulty. Replace cab control box wiring harness. (WP 0206) Verify
problem is solved. (Step 8 - Does cab control box ENGINE OFF/BATTERY DRAIN indicator illuminate?)
STEP 6
Are less than 200 ohms measured on black wire at cab control box ENGINE OFF/BATTERY DRAIN indicator
to known good ground?
1.
Push in EMERGENCY STOP switch to off position. (TM 5-3825-270-10)
2.
Disconnect batteries. (WP 0085)
3.
Set multimeter to measure continuity.
WARNING
Ensure electrical power is off prior to working on all electrical systems. Failure to comply
may result in injury or death to personnel.