TM 9-2350-287-20-1
2-19. TROUBLESHOOTING CHART (continued).
h. LIGHTS (continued).
(8) PARKING BRAKE INDICATOR LIGHT FAILS TO
OPERATE. Parking brake is set (continued).
CONTINUED FROM C
D. 1. Reconnect wires 509E to parking brake
warning switch assembly.
2. Disconnect harness 12268104 wire 509E
from harness 12260287 wire 509E behind
driver’s instrument panel.
3. Place red lead of multimeter on harness
12268104 wire 509E connector socket and
ground black lead.
4. Turn MASTER switch ON (refer to TM 9-
2350-287-10)
5. Check for 24 ± 3 vdc.
6. Turn MASTER switch OFF (refer to TM 9-
2350-287-10)
Is voltage indicated?
Repair wire 509E or replace harness
12260287 (para 7-56). Verify problem
is solved.
E. 1. Connect wire harness 12268104 wire509E
to wire harness 12260287 wire 509E.
2. Disconnect wire 450 of harness 12268104
from output circuit breaker no. 2 of
panel no. 1.
3. Place red lead of multimeter in output of
circuit breaker no. 2 and ground black lead.
4. Turn MASTER switch ON (refer to TM 9-
2350-287-10).
5. Check for 24 ± vdc.
Continued on next page
2-162
