Table 4-2. Unit Troubleshooting-continued -706880230

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

Table 4-2. Unit Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM - EMERGENCY MASTER CIRCUITS - Continued

ROTATING BEACONS DO NOT OPERATE - Continued

Step 5. Check wiring for continuity.

Replace wire (see para 4-9.4).

FRONT WARNING (CROSSFIRE) LIGHTS DO NOT OSCILLATE

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

Step 1. Check motor for proper operation.

Replace motor (see para 4-83).

Step 2. Check wiring for continuity.

Replace wire (see para 4-9.4).

FRONT WARNING (CROSSFIRE) LIGHTS DO NOT ILLUMINATE

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

Step 1. Check bulb.

Replace bulb (see para 4-83).

Step 2. Check wiring for continuity.

Replace wire (see para 4-9.4).

FRONT WARNING (CROSSFIRE) LIGHTS DO NOT OPERATE

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

Step 1. Check switch.

Replace switch (see para 4-94).

Step 2. Check for +12V at emergency master buss.

Refer to "+12 volts not present at emergency master buss" troubleshooting procedure.

Step 3. Check for +12V at circuit breaker #3 on emergency master buss.

Replace breaker (see para 4-99).

Step 4. Check wiring for continuity.

Replace wire (see para 4-9.4).

4-101