TM-9-2320-365-20-1 LMTV Unit Maintenance Manual M1078 Series - Volume 1 Download
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TEST OPTIONS REASON FOR QUESTION KNOWN INFO Voltage Test or STE/ICE-R Test #89 POSSIBLE PROBLEMS YES WARNING Read WARNING on following page. 4. e65. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT) TM 9-2320-365-20-1 2-784 Change 1 If 12 VDC is not present, wire 1408 is faulty. Is 12 VDC present at relay K29 terminal 86 on PDP? Repair wire 1408 from relay K29 terminal 86 on PDP to terminal board TB1 position 53 (para 2-40) or replace WTEC II dashboard cable assembly (para 7-10) or WTEC III dashboard cable assembly (para 7-11). 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 OK. Faulty dashboard cable assembly. Faulty relay K29. NO KNOWN INFO 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 OK. POSSIBLE PROBLEMS Faulty dashboard cable assembly. Faulty relay K29. TEST OPTIONS Continuity Test or STE/ICE-R Test #91 REASON FOR QUESTION If continuity is not present, wire 3040 is faulty. 5. Is continuity present from relay K29 terminal 85 on PDP to ground? NO Repair wire 3040 from K29 terminal 85 on PDP to terminal board TB2 position 20 (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 K29 (para 7-9).