TM 9-2350-287-20-1
2-19. TROUBLESHOOTING CHART (continued).
u. AUXILIARY POWER UNIT (continued).
(2) ENGINE FAILS TO CRANK. All other electrical
systems operate (continued).
Repair wire 65 or replace harness 12330248
(para 7-71). Verify problem is solved.
l. 1. Remove and disassemble APU control
box (para 7-22).
2. Place multimeter red probe on pin D and
black probe in lead 65 connector.
3. Check for continuity.
Repair wire 65A or replace harness 12330248
(para 7-71). Verify problem is solved.
J. 1. Check APU control box APU START switch
for continuity.
2. Place multimeter probes on each connector
of APU START switch.
3. Hold APU START switch in ON position
(refer to TM 9-2350-287-10).
4. Check for continuity.
Replace APU START switch (para 7-22).
Verify problem is solved.
K. 1. Check PREHEAT switch for continuity.
2. Place multimeter probes on each connector
of PREHEAT switch.
3. Place PREHEAT switch in ON position (refer
to TM 9-2350-287-10).
4. Check for continuity.
Continued on next page
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