TM 5-3805-261-20
Section XX. LIGHT SWITCH AND DIMMER TROUBLESHOOTING.
7-70.
GENERAL INFORMATION. This section lists the common light switch and dimmer 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.
7-71.
LIGHT SWITCH AND DIMMER 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.
LIGHT SWITCH AND DIMMER TROUBLESHOOTING AND MAINTENANCE PROCEDURES.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
a.
LIGHTS WILL NOT OPERATE.
Step 1. Check fuses.
If a fuse is blown--replace. Refer to paragraph 7-63.
Step 2. Check the wiring between lights and magnetic switch.
If the wires are corroded, damaged or defective--replace. Refer to paragraph 7-73.
Step 3. Test the continuity of the magnetic switch (Figure 7-98). Connect multimeter to the back of switch.
Figure 7-98
7-167
