TM 5-3805-292-23
0006
ELECTRICAL TROUBLESHOOTING - JOYSTICK PARKING BRAKE BUTTON INOPERATIVE
0006
Disconnect RH control handle
from chassis harness (WP 0084).
While pressing and releasing park
button, check for continuity
Continuity present
between RH control handle
w/ button pressed?
Replace RH control handle
connector 49B-2 circuit 319AB
Continuity NOT
NO
(R), handle side and RH control
present w/button
handle connector circuit 754AB
released?
(P), handle side
Connections) .
YES
Disconnect instrument panel (IP) (WP
Check for continuity between IP
connector C23-26, circuit 319C (T),
Perform Open Harness Test for circuit
Continuity
harness side and RH control handle
NO
present?
319 (WP 0173).
connector, 49-1 circuit 319G (T), harness
Connections and Frame 12. RH
Console).
YES
Check for continuity between IP
connector C23-10, circuit 754B (P),
Reconnect instrument panel (IP) (WP
harness side and RH control handle
Continuity
0155). Perform Open Harness Test for
NO
connector 49-2 circuit 754A (P),
present?
circuit 754 (WP 0173).
RH Console).
YES
Reconnect RH control handle to chassis
harness (WP 0084). Replace instrument
panel (WP 0155).