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Table 4-2. Unit Troubleshooting-continued -706880202
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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 -706880204
TM 5-4210-233-14&P-1
Table 4-2.
Unit Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM-IGNITION CIRCUITS-Continued
10
CHECK ENGINE LIGHT DOES NOT ILLUMINATE
(Refer to Electrical Wiring Diagrams, Appendix H, Steet 6 of 16)
Step 1. Check bulb.
Replace bulb (see para 4-95).
Step 2. Check engine light relay for proper operation.
Replace relay (see para 4-9.4).
Step 3. Check fuse.
Replace fuse (see para 4-9.4).
Step 4. Check DDEC Engine Control Module (ECM) using Diagnostic Data Reader (DDR).
Replace DDEC ECM.
Notify Direct Support.
11
ENGINE STARTER MOTOR DOES NOT OPERATE
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 5 of 16.)
Step 1. Check engine starter motor.
Replace starter motor. Notify Direct Support.
Step 2. Check A and B start solenoids.
Replace solenoid(s) (see para 4-9.4).
Step 3. Check A and B start switches.
Replace switch (see para 4-94).
Step 4. Check neutral start safety switch.
Replace switch (see para 4-9.4).
Step 5. Check for +12V at ignition accessory buss.
Refer to "+12 volts not present at ignition accessory buss" troubleshooting procedure.
Step 6. Check wiring for continuity.
Replace wire (see para 4-9.4).
4-74

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