1.
KNOWN INFO
TEST OPTIONS
NO
YES
WARNING
CAUTION
Read WARNING and
CAUTION on
following page.
Voltage Test or
STE/ICE-R Test #89
Troubleshoot trailer electrical
system per trailer technical
manual.
Go to step 2 of this fault.
e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE
Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
References
TM 9-4910-571-12&P
TM 9-2320-365-20-1
2-790 Change 1
Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB39 prior to beginning this task.
START
NOTE
REASON FOR QUESTION
Is 24 VDC present at
connector J130 socket F?
Faulty trailer electrical system.
Faulty dashboard cable
assembly.
Faulty relay K27.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.
POSSIBLE PROBLEMS
Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.
If 24 VDC is present, trailer
electrical system is faulty.
INITIAL SETUP
Equipment Condition
Engine shut down (TM 9-2320-365-10).
Personnel Required
(2)
Material/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)
