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).
Replace PREHEAT switch (para 7-22).
Verify problem is solved.
L. 1. Place multimeter red probe in wire 487 con-
nector and black probe on pin A.
2. Check for continuity.
Repair wire 487 or replace harness
12330248 (para 7-71). Verify problem is
solved.
M. 1. Place multimeter red probe in socket A of
harness 12330248 and black probe in socket
D.
2. Check for continuity.
3. Place multimeter red probe in socket B of
harness 12330248 and black probe in socket
c.
4. Check for continuity.
Repair wire 487 or wire 65B or replace harness
12330248 (para 7-71). Verify problem is solved.
N.
1. Assemble and install APU control box (para
7-22).
. .
2. Place multimter red probe in wire harness
12330248 connector 487 and black probe on
pin D.
3. Check for continuity.
Continued on next page
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