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TM 5-4210-233-14&P-1
Table 4-2.
Unit Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM-CAB CONTROLS AND INDICATORS-Continued
4
CLEARANCE LIGHTS DO NOT ILLUMINATE
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 1 of 16.)
Step 1.
Check bulb.
Replace bulb (see para 4-69).
Step 2.
Check for +12V at circuit breaker #7 on battery accessory buss.
Replace breaker (see para 4-99).
Step 3.
Check wiring for continuity.
Replace wire (see para 4-9.4).
5
TURN SIGNALS DO NOT FUNCTION PROPERLY
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 2 of 16.)
Step 1.
Check bulb.
Replace bulb (see para 4-65).
Step 2.
Check directional control switch for proper operation.
Replace flasher unit (see para 4-9.4).
Step 3.
Check for +12V at circuit breaker #1 5 on battery accessory buss.
Replace breaker (see para 4-99).
Step 4.
Check wiring for continuity.
Replace wire (see para 4-9.4).
6
BACKUP LIGHTS DO NOT ILLUMINATE, OR BACKUP ALARM DOES NOT SOUND
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 8 of 16.)
Step 1.
Check bulb or alarm.
Replace bulb/alarm (see para 4-64 and 4-67).
Step 2.
Check transmission switch for proper operation.
Replace switch (see para 4-100).
4-79
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