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).
CONTINUED FROM D
D. 3. Disconnect harness 12329640 from APU
compartment wall.
4. Using multimeter check continuity between
lead 66 and pin A of harness connector
12329640.
Is continuity indicated?
Repair lead 66 or replace harness
12329640 (para 18-21). Verify
problem is solved.
E. 1. Disconnect lead 66 from connector 10.
2. Using multimeter check continuity from
socket A and pin on wire 66.
Is continuity indicated?
F. 1. Connect lead 66 to connector 10.
2. Connect lead 66 to input of APU starter
relay.
3. Connect harness 12329640 to APU com-
partment wall connector.
4. Disconnect lead 6512329640 from input
side of APU starter relay.
5. Place red probe of multimeter in socket of
lead 65 and ground black probe.
Continued on next page
2-305
Repair lead 66 or replace harness
12330248 (para 7-71). Verify problem
is solved.