TM 5-3805-261-20Section XX. LIGHT SWITCH AND DIMMER TROUBLESHOOTING.7-70.GENERAL INFORMATION. This section lists the common light switch and dimmer malfunctions which may occurduring the operation of the 130G Grader. You should perform the tests, inspections and corrective actions in the orderlisted. 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 possiblemalfunctions, nor can it list all possible tests, inspections or corrective actions. If a malfunction is not listed, contact yoursupervisor.LIGHT SWITCH AND DIMMER TROUBLESHOOTING AND MAINTENANCE PROCEDURES.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONa.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 7-987-167
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