8-50. BOOM ELECTRICAL CABLE TEST/REPAIR/REPLACE
This Task Covers:
Tools and Special Tools
Tie Wraps (Item 40, Appendix C)
Tool Kit, General Mechanic's: Automotive
(Item 18, Appendix F)
Rope, 25 ft
Multimeter, Digital (Item 9, Appendix F)
Electrical Tape (Item 39, Appendix C)
Tags (Item 38, Appendix C)
Failure of an electrical device to function is more likely due to a faulty switch or faulty device rather
than to a broken wire. Do not assume that a broken wire exists until related electrical device and
actuator have been checked.
Inspect wires for poor connections at terminals, cuts, or other defects.
Check wire continuity to determine if hidden breaks exist.
Use electrical schematic to trace path of wire (refer to FO-1).
Disconnect negative battery cable (Para 8-42).
Connect multimeter leads to each end of wire.
An infinite resistance reading indicates a broken wire.
Connect negative battery cable (Para 8-42).
If an individual wire in a wire harness is broken, it is not necessary to replace entire wire harness (refer
to c. Repair below).
Start engine (TM 10-3930-673-10). Raise forks approximately one foot off ground. Stop engine.
Disconnect negative battery cable (Para 8-44).