Table 4-2. Unit Troubleshooting-continued -706880260

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

4-2. Unit Troubleshooting-Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM - AERIAL CONTROL PANEL - Continued

4 TURNTABLE STEP LIGHTS DO NOT ILLUMINATE WITH AERIAL MASTER ON

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

Step 1. Check bulb.

Replace bulb (see para 4-14).

Step 2. Confirm that aerial panel light illuminates.

If aerial panel light does not illuminate, refer to "swivel assembly slip ring contact interrupted"

troubleshooting procedure.

If aerial panel light illuminates, go on to Step 3.

Step 3. Check wiring from terminal block to lights for continuity.

Replace wire (see para 4-9.4).

5 LEFT OR RIGHT TRACKING LIGHT WILL NOT ILLUMINATE IN FLOOD OR SPOT SWITCH

POSITION (Refer to Electrical Wiring Diagrams, Appendix H, Sheet 10 of 16.)

Step 1. Check bulb(s).

Replace bulb(s) (see para 4-177).

Step 2. Check switch at light for proper operation in both spot (down) and flood (up) positions.

Replace switch (see para 4-177).

Step 3. Check "tracking lights" switch on aerial console for proper operation.

Replace switch (see para 4-179).

Step 4. Check wiring from terminal strip under aerial console to tracking light for continuity.

Replace wire (see para 4-9.4).

Step 6. Refer to "swivel assembly slip ring contact interrupted" troubleshooting procedure.

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