MAIN WIRING HARNESS MAINTENANCE

TM 10-3930-660-24-1

MAIN WIRING HARNESS MAINTENANCE

0110 00

THIS WORK PACKAGE COVERS

Testing, Repair, Removal, Installation

INITIAL SETUP

Materials/Parts - Continued

Tools and Special Tools

Tool kit, general mechanic's (Item 39, WP 0324 00)

Tape, electrical (Item 58, WP 0323 00)

Shop equipment, common no. 1 (Item 20, WP 0324

References

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Materials/Parts

Equipment Condition

Strap, tie down (Item 56, WP 0323 00)

Tag, marker (Item 57, WP 0323 00)

Battery cables disconnected (WP 0107 00)

TESTING

NOTE

Failure of an electrical device to function is more likely due to a switch (actuator) or to a device itself, than

to a broken wire in wiring harness. 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 continuity of wires to determine if hidden breaks exist.

Use electrical schematic to trace path of wire.

NOTE

A zero reading indicates a broken wire.

Connect ohmmeter leads to each end of wire.

Disconnect suspected wire and an adjacent wire. At one end of wires, connect the two wire terminals together. At the

other end of the wires, connect ohmmeter leads to terminals of these two wires at other ends.

REPAIR

NOTE

If three or more wires in a wiring harness have been repaired or replaced, replace complete harness.

Replace any broken terminal rings or connectors.

Disconnect faulty wire at both ends.

Cut insulation back approximately 4 in. (102 mm).

Cut replacement wire to required length and install proper terminals.

Route replacement wire along wiring harness, securing wire with tie down straps or electrical tape.

Connect replacement wire to original connection points.

Test circuit function.