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TM 9-2320-364-20-2
2-1480
34. ENGINE BRAKE DOES NOT OPERATE IN LOW (CONT).
Reverse light operates
indicating 10 to 14 vdc to wire
1871.
Dash lights operate indicating
10 to 14 vdc to circuit breaker
CB7.
Engine brake harness OK.
Engine brake(s) OK.
Engine brake circuit breaker
CB7 OK.
Wire 1712 OK.
Engine brake switch OK.
Wire 1713 OK.
Wire 1711 OK.
Wire 508 OK.
DDEC ECM OK.
TRANS relay R7 OK.
Wire 1839 OK.
Wire 211 OK.
Relay R8 wire 1871 OK.
Wire 213 OK.
ATEC ECU OK.
Retarder relay R8 OK.
Wire 1716 OK.
Circuit breaker CB11 wire 1871
OK.
Wire 1711 OK.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Verify repair.
YES
NO
Fault not corrected.
Notify DS
Maintenance.
18.
Does engine brake operate
correctly in low?
Fault corrected.
If engine brake operates in low,
fault has been corrected.
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