TM 5-3825-270-23&P
0061
DECISION
No - Replace red wire between engine speed RPM switch and engine RESUME/IDLE switch. (WP 0099) Verify
problem is solved. (Step 8 - Does cab control box engine speed RPM switch operate?)
Yes - Go to step 4. (Step 4 - Are less than 200 ohms measured on black wire at cab control box engine speed
RPM switch to known good ground?)
STEP 4
Are less than 200 ohms measured on black wire at cab control box engine speed RPM switch 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.
Remove all jewelry, such as rings, ID tags, bracelets, etc., prior to working on or around
equipment. 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.
4.
Connect red multimeter lead to black wire at cab control box engine speed RPM switch.
BACK OF CAB
CONTROL BOX
WHITE WIRE
CAB
CONTROL BOX
ENGINE SPEED
RED JUMPER WIRES
RPM SWITCH
BLACK WIRE
Figure 5. Cab Control Box Engine Speed RPM Switch - Step 4.
5.
Connect black multimeter lead to known good ground.
6.
Note multimeter reading.
CONDITION/INDICATION
Are less than 200 ohms measured on black wire at cab control box engine speed RPM switch to known good
ground?
DECISION
No - Go to step 7. (Step 7 - Are less than 200 ohms measured at UPIK harness connector pin D to known good
ground?)
Yes - Go to step 5. (Step 5 - Are less than 200 ohms measured on white wire at cab control box engine speed
RPM switch to known good ground?)