Table 4-2. Unit Troubleshooting-continued -706880274

TM 5-4210-233-14&P-1

4-2. Unit Troubleshooting-Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM - APU AND 11O-VOLT CIRCUITS - Continued

7 NO POWER AT LADDER TIP OUTLET

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 15 of 16.)

Step 1. Check aerial control panel switch for proper operation.

Replace switch (see para 4-179).

Step 2. Check turntable slip rings for continuity.

Replace swivel unit. Notify Direct Support.

Step 3. Refer to 1 OV outlet troubleshooting procedure.

8 11OV PORTABLE WORK LIGHT DOES NOT ILLUMINATE WITH CAB SWITCH

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 15 of 16.)

Step 1. Check floodlight bulb.

Replace bulb (see para 4-124).

Step 2. Check relay for proper operation.

Replace relay (see para 4-9.4)

Step 3. Check circuit breaker.

Reset/replace breaker (see para 4-119).

Step 4. Check dash panel switch for proper operation.

Replace switch (see para 4-94).

Step 5. Check breaker #14 on battery accessory buss for +12V.

Replace breaker (see para 4-99).

4-145