Table 4-2. Unit Troubleshooting-continued -706880212

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

ENGINE COMPARTMENT LIGHTS DO NOT ILLUMINATE

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 3 of 16.)

Step 1. Check bulb.

Replace bulb (see para 4-9.4).

Step 2. Check switch at fixture.

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).

CAB OR CREW CAB DOME LIGHTS DO NOT ILLUMINATE

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

Step 1. Check bulb.

Replace bulb (see para 4-9.4 and 4-97).

Step 2. Check switch at fixture.

Replace switch (see para 4-9.4 and 4-97).

Step 3. Check door switch (step light may also fail to come on when door is opened).

Replace door switch (see para 4-9.4).

Step 4. Check for +12V at circuit breaker #10 on battery accessory buss.

Replace breaker (see para 4-99).

Step 5. Check wiring for continuity.

Replace wire (see para 4-9.4).

4-83