CONDITION/INDICATION
Are 22 to 28 vdc measured on wire 1003C at rear junction box, terminal wire 1003C?
DECISION
Voltage OK - Go to (Step 6 - Can composite light harness wire 1003C be repaired?).
Voltage Faulty - Go to (Step 5 - Can trailer main harness wire 1003C be repaired?).
STEP 5
Can trailer main harness wire 1003C be repaired?
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
Wire is not repairable if damage cannot be visually located or if a prior repair has already
reduced length of wire. Wire is not repairable if after repair, wire is too short to reach its
connection point.
1.
Have assistant release brake pedal. Refer to vehicle Operator's manual (WP
0190).
CONNECTOR
MC15
TRAILER
HARNESS
Figure 5.
Trailer Harness Connector MC15.
2.
Visually check if trailer main harness wire 1003C can be repaired.
CONDITION/INDICATION
Can trailer main harness wire 1003C be repaired?
DECISION
Repair - Repair wire 1003C (WP
0055). Go to (Step 7 - Do stoplights operate?) to verify problem is solved.
No Repair - Replace main trailer harness (WP
0059). Go to (Step 7 - Do stoplights operate?) to verify problem is
solved.
TM 9-2330-342-23&P
0024
0024-6