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Table 4-2. Unit Troubleshooting-continued -706880249
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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 -706880251
TM 5-4210-233-14&P-1
Table 4-2. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM - PUMP PANEL - Continued
2
OUTRIGGER ALARM DOES NOT SOUND WHEN OUTRIGGERS STOWED AND DIVERTER
VALVE IS SWITCHED TO OUTRIGGER POSITION
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 7 of 16.)
Step 1. Check that "outrigger" light is illuminated.
If light is not illuminated, refer to diverter valve test procedure.
If light is illuminated, go on to Step 2.
Step 2. Check alarm for 12 volts across terminals.
If 12 volts is present at alarm, replace alarm.
If 12 volts is not present at alarm, go on to Step 3.
Step 3. With all power off, check contacts of outrigger and alarm interlock relays for continuity
(3, 9 left ply, 1, 7 right ply.)
Replace relay (see para 4-9.4).
Step 4. Check for +1 2V at aerial circuit breaker #2.
Replace breaker (see para 4-99).
Step 5. Check outrigger down limit switches by testing for +12 signal on wire #2389 when
V
engaged (outrigger down).
Replace limit switch (see para 4-196).
Step 6. Check front left outrigger down and front right outrigger down relays. Left - Continuity
between #1233 and wire #1249 when coil is energized. Right - continuity between wire
#1248 and #1228 when coil is energized.
Replace relay (see para 4-9.4).
4-121

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