No Manual Low Beam

Check for defective high-low beam relay. To do so, remove high-low beam relay, and check for continuity between Red/Yellow wire (circuit No. 15) and Red/Black wire (circuit No. 13). Check for damaged dimmer switch. To do so, disconnect dimmer switch. See DIMMER SWITCH under REMOVAL & INSTALLATION. Replace dimmer switch if headlights return to low beam. Check for damaged flash-to-pass relay. To do so, remove relay. Replace relay if headlights return to low beam.