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Table 4-2. Unit Troubleshooting-continued -706880231
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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Table 4-2. Unit Troubleshooting-continued -706880233
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
9
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).
10
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).
11
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

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