TM 9-2350-287-20-1
2-19. TROUBLESHOOTING CHART (continued).
u. AUXILIARY POWER UNIT (continued).
(5) ENGINE OVERHEATS (continued).
D.
Repair lead 493 or replace harness
12329650 (para 18-22). Verify problem
is solved.
1. Connect lead 493 to HIGH AIR
Temperature switch.
2. Remove APU control box (para 7-22).
3. Disconnect harness 12330248 connector
from APU control box.
4 Using a multimeter check continuity be-
tween socket C harness 1233180 at APU
wall and pin J at control box connector.
5. Check for continuity.
Repair wire 493 or replace harness
12330248. (para 7-71). Verify problem is
solved.
E. 1. Connect harness 12329650 to APU com-
partment wall.
2. Disassemble APU control box (para 7-22).
3. Place multimeter red probe in socket J of
APU control box connector and black probe
in wire 493 connector.
4. Check for continuity.
Continued on next page
2-315