Table 4-2. Unit Troubleshooting-continued -706880261

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

4-2. Unit Troubleshooting-Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM - AERIAL CONTROL PANEL - Continued

6 LEFT OR RIGHT TIP LIGHT WILL NOT ILLUMINATE IN FLOOD OR SPOT SWITCH POSITION

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 12 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 "tip lights" switch at aerial console for proper operation.

Replace switch (see para 4-179).

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

NOTE

Each tip light uses two wires in the left side front traveler to

supply +12V.

Replace wire (see para 4-9.4).

Step 5. Refer to "swivel assembly slip ring contact interrupted" troubleshooting procedure.

7 RUNG ALIGNMENT LIGHT WILL NOT ILLUMINATE WHEN RUNGS ARE ALIGNED

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 11 of 16.)

Step 1. Check bulb.

Replace bulb (see para 4-178).

Step 2. Check switch for proper operation.

Adjust/replace switch (see para 4-179).

Step 3. Check wiring from switch to light for continuity.

Replace wire (see para 4-9.4).

4-132