TM 5-3805-261-20
Section XXX. WIRING HARNESS TROUBLESHOOTING.
7-114.
GENERAL INFORMATION. This section lists the common wiring harness malfunctions which may occur during
the operation of the 130G Grader. You should perform the tests, inspections and corrective actions in the order listed.
Follow the troubleshooting procedures listed below step-by-step until you can go no further.
7-115.
WIRING HARNESS TROUBLESHOOTING PROCEDURES. This section cannot list all possible malfunctions,
nor can it list all possible tests, inspections or corrective actions. If a malfunction is not listed, contact your supervisor.
WIRING HARNESS TROUBLESHOOTING AND MAINTENANCE PROCEDURES.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
To perform wiring harness troubleshooting, use the continuity test procedure shown below. The
steps are to be preformed in the order indicated. The figure numbers indicate location on the
vehicle and connections.
Step 1. Clean and inspect all wiring harness terminals and connections for damage, defects or corrosion.
If repair to terminals or connections is necessary, refer to General Repair, paragraph 7-117.
Step 2. Set up and zero multimeter.
NOTE
If the multimeter cannot be zeroed, check the multimeter batteries. If the batteries are in good
condition--replace multimeter.
Step 3. Disconnect wiring harness from power source. To be safe, disconnect the positive cable on the right side.
Step 4. Connect multimeter to both ends of the wiring harness being tested. Refer to figure numbers for
connection locations.
Change 1 7-282
