Table 4-2. Unit Troubleshooting-continued -706880232

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

REAR WARNING STROBES DO NOT ILLUMINATE/FLASH - Continued

Step 4. Check trigger unit.

Replace trigger unit (see para 4-61).

Step 5. Check for +12V at circuit breaker #4 on emergency master buss.

Replace breaker (see para 4-99).

Step 6. Check wiring for continuity.

Replace wire (see para 4-9.4).

DECK SPOTLIGHTS DO NOT ILLUMINATE

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 8 of 16.)

Step 1. Check bulb.

Replace bulb (see para 4-63).

Step 2. Check switch at fixture.

Replace switch (see para 4-63).

Step 3. Check for +12V at battery accessory buss.

Refer to "+12 volts not present at battery accessory buss" troubleshooting procedure.

Step 4. Check wiring for continuity.

Replace wire (see para 4-9.4).

ELECTRONIC SIREN DOES NOT SOUND

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 3 of 16.)

Step 1. Check for +12V at emergency master buss.

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

Step 2. Check speaker for proper operation.

Replace speaker (see para 4-86).

4-103