TM-9-2320-366-20-1 MTV Unit Maintenance Manual M1083 Series - Volume 1 Download
Page 1362 of 1824
TM 9-2320-366-20-1 e66. TRAILER RIGHT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT) 2-798 Change 1 KNOWN INFO TEST OPTIONS Continuity Test or STE/ICE-R Test #91 REASON FOR QUESTION POSSIBLE PROBLEMS Towing vehicle right stop/turn light OK. Circuit breaker CB44 OK. Trailer electrical system OK. 2. Faulty dashboard cable assembly. Faulty relay K31. Faulty rear lights cable assembly. Faulty rear intervehicular 24 VDC (12 pin) cable. Is continuity present from connector J130 socket J to relay K31 terminal 87? CAUTION Read CAUTION on following page. Go to step 6 of this fault. TEST OPTIONS KNOWN INFO WARNING Read WARNING on following page. Voltage Test or STE/ICE-R Test #89 REASON FOR QUESTION If 24 VDC is not present, wire 1956 is faulty. Is 24 VDC present at relay K31 terminal 30 on PDP? 3. POSSIBLE PROBLEMS 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. NO YES NO YES Repair wire 1956 from K31 terminal 30 on PDP to circuit breaker CB44 terminal 6 (para 2-45) or replace WTEC II dashboard cable assembly (para 7-10) or WTEC III dashboard cable assembly (para 7-11). This question eliminates possible problems and determines where troubleshooting continues.