TM-9-2320-365-20-1 LMTV Unit Maintenance Manual M1078 Series - Volume 1 Download
Page 1158 of 1760
e63. TRAILER RIGHT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT) TM 9-2320-365-20-1 2-762 Change 1 CAUTION Read CAUTION on following page. 2. TEST OPTIONS Continuity Test or STE/ICE-R Test #91 REASON FOR QUESTION KNOWN INFO Towing vehicle right stop/turn light OK. Circuit breaker CB44 OK. Trailer electrical system OK. POSSIBLE PROBLEMS Faulty dashboard cable assembly. Faulty relay K31. Faulty rear lights cable assembly. Faulty rear intervehicular 24 VDC (12 pin) cable. NO Go to step 6 of this fault. YES WARNING Read WARNING on following page. 3. TEST OPTIONS Voltage Test or STE/ICE-R Test #89 REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS NO Repair wire 1956 from K31 terminal 30 on PDP to circuit breaker CB44 terminal 6 (para 2-40) or replace WTEC II dashboard cable assembly (para 7-10) or WTEC III dashboard cable assembly (para 7-11). YES If 24 VDC is not present, wire 1956 is faulty. This question eliminates possible problems and determines where troubleshooting continues. Is 24 VDC present at relay K31 terminal 30 on PDP? Is continuity present from connector J130 socket J to relay K31 terminal 87? Towing vehicle right stop/turn light OK. Circuit breaker CB44 OK. Trailer electrical system OK. Rear lights cable assembly OK. Rear intervehicular 24 VDC (12 pin) cable OK. Faulty dashboard cable assembly. Faulty relay K31.