Table 4-2. Unit Troubleshooting-continued -706880214

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

REAR SCENE LIGHTS DO NOT ILLUMINATE WITH CAB SWITCH

(Refer to Electrical Wiring Diagrams, Appendix H, Sheets 3 and 8 of 16.)

Step 1. Check bulb.

Replace bulb (see para 4-66).

Step 2. Check cab switch.

Replace switch (see para 4-94).

Step 3. Check for +12V at circuit breaker #6 on battery accessory buss.

Replace breaker (see para 4-99).

Step 4. Check wiring for continuity.

Replace wire (see para 4-9.4).

CREW CAB EXHAUST FANS DO NOT OPERATE

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 1 of 16.)

Step 1. Check motor.

Replace motor (see para 4-89).

Step 2. Check switch.

Replace switch (see para 4-9.4).

Step 3. Check for +12V at circuit breaker #12 on battery accessory buss.

Replace breaker (see para 4-99).

Step 4. Check wiring for continuity.

Replace wire (see para 4-9.4).

4-85