TM 10-3930-675-20-1
0016 00-11
INPUT AND OUTPUT SIGNALS FOR STEERING ECU (792) TROUBLESHOOTING - CONTINUED
0016 00
Table 16. Error Code 427 - Tophandler Work Light Switch, Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 427 - Tophandler Work Light
Switch, Circuit Failure
1. Check for a tripped circuit
breaker F-17 (WP 0073 00).
Reset circuit breaker.
2. Check voltage at tophandler
work light switch connector
106-2 pin 5. Voltage should
be 22-26V.
If voltage is not as specified,
check wires A678 and 678 for
damage. Repair or replace
connectors (WP 0111 00).
3. Check voltage at tophandler
work light switch connector
106-2 pin 1. Voltage should
be
22-26V
with
switch
activated and 0V with switch
not activated.
If voltage is not as specified,
replace tophandler work light
switch (WP 0072 00).
4. Check continuity between
tophandler work light switch
connector 106-2 pin 1 and
connector X67 pin 9.
a. If continuity between pins,
repair or replace connectors
(WP 0111 00).
b. If
continuity
(short)
to
chassis, repair or replace
connectors (WP 0111 00).
c. If continuity is present, notify
SRA.
5. Check continuity between
connector X67 pin 9 and
connector X46 pin 6.
a. If continuity between pins,
repair or replace connectors
(WP 0111 00).
b. If
continuity
(short)
to
chassis, repair or replace
connectors (WP 0111 00).
c. If continuity is present, notify
SRA.
6. Check continuity between
connector X46 pin 6 and
connector X174 pin 11.
a. If continuity between pins,
repair or replace connectors
(WP 0111 00).
b. If
continuity
(short)
to
chassis, repair or replace
connectors (WP 0111 00).
c. If continuity is present, notify
SRA.
7. Check continuity between
connector X174 pin 11 and
steering ECU (792) connector
pin 102.
a. If continuity between pins,
repair or replace connectors
(WP 0111 00).
b. If
continuity
(short)
to
chassis, repair or replace
connectors (WP 0111 00).
c. If problem persists, notify
SRA.
