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Page Title:
TRAILER MARKER/TAILLIGHTS DO NOT ILLUMINATE (Cont) |
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 TM 9-2320-366-20-1
e65. TRAILER MARKER/TAILLIGHTS DO NOT ILLUMINATE (CONT)
WARNING
Read WARNING
KNOWN INFO
TEST OPTIONS
on following page.
4.
Voltage Test or
Towing vehicle marker/taillights
STE/ICE-R Test #89
OK.
Is 12 VDC present at relay
REASON FOR QUESTION
Circuit breaker CB41 OK.
K28 terminal 86 on PDP?
Trailer electrical system OK.
If 12 VDC is not present,
Rear lights cable assembly OK.
wire 1955 is faulty.
Rear intervehicular 24 VDC
(12 pin) cable.
POSSIBLE PROBLEMS
NO
Faulty dashboard cable
assembly.
Faulty relay K28.
Repair wire 1955 from relay K28 terminal 86 on
PDP to terminal board TB1 position 5 (para 2-45)
YES
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
KNOWN INFO
TEST OPTIONS
5.
Continuity Test or
Towing vehicle marker/taillights
STE/ICE-R Test #91
OK.
Is continuity present from
REASON FOR QUESTION
Circuit breaker CB41 OK.
relay K28 terminal 85 on
Trailer electrical system OK.
If continuity is not present,
PDP to ground?
Rear lights cable assembly OK.
wire 3056 is faulty.
Rear intervehicular 24 VDC
(12 pin) cable.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
NO
Faulty relay K28.
Repair wire 3056 from K28 terminal 85 on PDP
to terminal board TB2 position 22 (para 2-45) or
YES
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly ( para 7-11).
Replace relay K28 (para 7-9).
2-790
Change 1
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