ELECTRICAL SYSTEM - CABLE CONTINUITY TEST

TM 5-5420-279-23

5 - 142 ELECTRICAL SYSTEM - CABLE CONTINUITY TEST

This task covers:

a. Test

INITIAL SETUP:

Tools Required

Tool Kit, General Mechanic's, Automotive (GMTK)

Multi-Meter (Shop Set Contact Maintenance Truck HMMWV)

Material Required

None

Equipment Conditions

Vehicle switched off and battery shutoff switch in the off position

Multi-Meter set to ohms

Test

(1)

Disconnect the cable from the component (switch, solenoid, junction box, etc) at the

working end of the circuit and at the power end.

(2)

Check continuity from the power end of the cable to the working end of the cable.

If continuity is not measured go to step 4.

If continuity is measured, the fault has not been isolated. Continue with the fault

isolation tests or notify supervisor.

(3)

Disconnect the first connector from the working end of the cable in line to the power

source.

(4)

Check continuity.

If continuity is not measured go to step 6.

If continuity is measured, a fault is in the section of the cable most recently

disconnected. Repair or replace the cable and perform the continuity test again.

(5)

Repeat steps 3 and 4 until all sections of the suspect cable are tested.

(6)

Replace faulty cable as required.

(7)

Switch the battery shutoff switch to the on position.