Table 4-2. Unit Troubleshooting-continued -706880211

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

ELECTRIC HORNS DO NOT SOUND

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

Step 1. Check horns for proper operation.

Replace horns (see para 4-9.4).

Step 2. Check horn relay.

Replace relay (see para 4-9.4).

Step 3. Check column switch for proper operation.

Replace switch (see para 4-9.4).

Step 4. Check wiring for continuity.

Replace wire (see para 4-9.4).

REAR SIGNAL BUZZER DOES NOT OPERATE

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 4 of 16.)

Step 1. Check switch for proper operation.

Replace switch (see para 4-68).

Step 2. Check buzzer unit for proper operation.

Replace buzzer (see para 4-96).

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).

4-82