TM-9-2320-366-20-1 MTV Unit Maintenance Manual M1083 Series - Volume 1 Download
Page 1384 of 1824
TM 9-2320-366-20-1 e68. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT) REASON FOR QUESTION KNOWN INFO Voltage Test or STE/ICE-R Test #89 POSSIBLE PROBLEMS WARNING Read WARNING on following page. 4. Is 12 VDC present at relay K29 terminal 86 on PDP? Faulty dashboard cable assembly. Faulty relay K29. Towing vehicle blackout marker lights OK. Circuit breaker CB42 OK. Trailer electrical system OK. Rear lights cable assembly OK. Rear intervehicular 24 VDC (12 pin) cable. If 12 VDC is not present, wire 1408 is faulty. NO Repair wire 1408 from relay K29 terminal 86 on PDP to terminal board TB1 position 53 (para 2-45) or replace WTEC II dashboard cable assembly (para 7-10) or WTEC III dashboard cable assembly (para 7-11). YES TEST OPTIONS KNOWN INFO TEST OPTIONS Continuity Test or STE/ICE-R Test #91 REASON FOR QUESTION POSSIBLE PROBLEMS 5. Is continuity present from relay K29 terminal 85 on PDP to ground? Faulty dashboard cable assembly. Faulty relay K29. Towing vehicle blackout marker lights OK. Circuit breaker CB42 OK. Trailer electrical system OK. Rear lights cable assembly OK. Rear intervehicular 24 VDC (12 pin) cable. If continuity is not present, wire 3040 is faulty. 2-820 Change 1 NO Repair wire 3040 from K29 terminal 85 on PDP to terminal board TB2 position 20 (para 2-45) or replace WTEC II dashboard cable assembly (para 7-10) or WTEC III dashboard cable assembly ( para 7-11). YES Replace relay K29 (para 7-9).