TM-9-2320-365-20-1 LMTV Unit Maintenance Manual M1078 Series - Volume 1 Download
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e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT) TM 9-2320-365-20-1 2-796 Change 1 CAUTION Read CAUTION on following page. 6. TEST OPTIONS Continuity Test or STE/ICE-R Test #91 REASON FOR QUESTION KNOWN INFO Towing vehicle blackout stoplights OK. Circuit breaker CB39 OK. Trailer electrical system OK. Relay K27 OK. POSSIBLE PROBLEMS Faulty dashboard cable assembly. Faulty rear lights cable assembly. Faulty rear intervehicular 24 VDC (12 pin) cable. Is continuity present from relay K27 terminal 87 on PDP to connector J51 pin 8? If continuity is not present, wire 23T is faulty. NO YES Repair wire 23T from relay K27 terminal 87 on PDP to connector J51 pin 8 (para 2-40) or replace WTEC II dashboard cable assembly (para 7-10) or WTEC III dashboard cable assembly ( para 7-11).