TM-9-2320-366-20-1 MTV Unit Maintenance Manual M1083 Series - Volume 1 Download
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TM 9-2320-366-20-1 e69. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT) 2-828 Change 1 KNOWN INFO TEST OPTIONS NO TEST OPTIONS KNOWN INFO NO YES YES WARNING Read WARNING on following page. Continuity Test or STE/ICE-R Test #91 REASON FOR QUESTION Voltage Test or STE/ICE-R Test #89 REASON FOR QUESTION POSSIBLE PROBLEMS 3. 2. POSSIBLE PROBLEMS Go to step 6 of this fault. CAUTION Read CAUTION on following page. Faulty dashboard cable assembly. Faulty relay K27. Faulty dashboard cable assembly. Faulty relay K27. Faulty rear lights cable assembly. Faulty rear intervehicular 24 VDC (12 pin) cable. Is 24 VDC present at relay K27 terminal 30 on PDP? Is continuity present from connector J130 socket F to relay K27 terminal 87? If 24 VDC is not present, wire 1959 is faulty. Repair wire 1959 from K27 terminal 30 on PDP to circuit breaker CB39 terminal 4 (para 2-45) or replace WTEC II dashboard cable assembly (para 7-10) or WTEC III dashboard cable assembly (para 7-11). Towing vehicle blackout stoplights OK. Circuit breaker CB39 OK. Trailer electrical system OK. Towing vehicle blackout stoplights OK. Circuit breaker CB39 OK. Trailer electrical system OK. Rear lights cable assembly OK. Rear intervehicular 24 VDC (12 pin) cable OK. This question eliminates possible problems and determines where troubleshooting continues.