TM-9-2320-366-20-2 MTV Unit Maintenance Manual M1083 Series - Volume 2 Download
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TM 9-2320-366-20-2 KNOWN INFO TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS Voltage Test or STE/ICE-R Test #89 WARNING Read WARNING on following page. WARNING Read WARNING on following page. 2-1550 Change 1 7. 8. POSSIBLE PROBLEMS Circuit breakers CB71, CB72, and CB74 OK. Hazard lights illuminate. Light bulb OK. Auxiliary panel cable assembly OK. Worklights switch OK. Relay K12 OK. Is 12 VDC present at diode D2B terminal 4? Go to step 8 of this fault. Go to step 12 of this fault. YES NO TEST OPTIONS Voltage Test or STE/ICE-R Test #89 REASON FOR QUESTION This question eliminates possible problems and determines where troubleshooting continues. Faulty dashboard cable assembly. Faulty diode D2B. Faulty relay K9. Circuit breakers CB71, CB72, and CB74 OK. Hazard lights illuminate. Light bulb OK. Auxiliary panel cable assembly OK. Diode D2B OK. Worklights switch OK. Relay K12 OK. If 12 VDC is not present, wire 1514 is faulty. Is 12 VDC present at relay K9 terminal 86? Faulty dashboard cable assembly. Faulty relay K9. NO Repair wire 1514 from relay K9 terminal 86 on PDP to circuit breaker CB74 terminal 6 (para 2-45) or replace WTEC II dashboard cable assembly (para 7-10) or WTEC III dashboard cable assembly (para 7-11). YES e148. M1088/M1089 WORKLIGHTS DO NOT ILLUMINATE (CONT)