Table 4-2. Unit Troubleshooting-continued -706880208

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

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).

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).

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