KNOWN INFO                     POSSIBLE PROBLEMS                    KNOWN INFO                     POSSIBLE PROBLEMS        Other marker lights illuminate. RH door marker light lamp OK. Faulty lamp. Faulty marker light. Faulty RH door and cab marker lights cable assembly. Other marker lights illuminate. RH door marker light lamp OK. RH cab marker light lamp OK. Faulty marker light. Faulty RH door and cab marker lights cable assembly. If continuity is not present, RH cab marker light lamp is faulty. Continuity Test or STE/ICE-R Test #91 Is continuity present from terminal lug TL131 to ground? YES NO     REASON FOR QUESTION                TEST OPTIONS            9. YES NO     REASON FOR QUESTION                TEST OPTIONS            Is continuity present through RH cab marker light lamp? 8. Go to step 12 of this fault. Continuity Test or STE/ICE-R Test #91 This question eliminates possible problems and determines where troubleshooting continues. Replace RH cab marker light lamp (para 7-31). e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT) TM 9-2320-365-20-1 2-558          Change 1