TM-9-2320-365-20-1 LMTV Unit Maintenance Manual M1078 Series - Volume 1 Download
Page 1150 of 1760
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?