TEST OPTIONS
REASON FOR QUESTION
KNOWN INFO
Voltage Test or
STE/ICE-R Test #89
POSSIBLE PROBLEMS
WARNING
Read WARNING
on following page.
4.
e62. TRAILER MARKER/TAILLIGHTS DO NOT ILLUMINATE (CONT)
TM 9-2320-365-20-1
2-754 Change 1
Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.
Faulty dashboard cable
assembly.
Faulty relay K28.
NO
Repair wire 1955 from relay K28
terminal 86 on PDP to terminal board
TB1 position 5 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
YES
5.
TEST OPTIONS
Continuity Test or
STE/ICE-R Test #91
REASON FOR QUESTION
KNOWN INFO
Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty relay K28.
NO
Repair wire 3056 from K28 terminal 85
on PDP to terminal board TB2 position
22 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
( para 7-11).
YES
Replace relay K28
(para 7-9).
If continuity is not present,
wire 3056 is faulty.
If 12 VDC is not present, wire
1955 is faulty.
Is 12 VDC present at relay
K28 terminal 86 on PDP?
Is continuity present from
relay K28 terminal 85 on
PDP to ground?
