TM9-2320-363-20-1 Table    3-1. Troubleshooting (Cont) Malfunction Test   or   Inspection Corrective    Action Step    3. ELECTRICAL SYSTEM   (CONT) Headlight Circuits    (Cont) Disconnect   left   headlight power    relay   from   connector. Check for   +12 VDC at connector 85. . If   +12 VDC is   present, replace left and right headlight power relay (pages 4-197, 4-198). If   no    voltage is    present at connector  85,   repair    lead    420M (page 3-2). 2. LEFT HEADLIGHT FAILS TO OPERATE WHEN SWITCH IS   TURNED ON. Step   1. Inspect headlight bulb. . Replace if   broken    or   defective (page 4-206). Step 2. Check left    headlight 15A   fuse. . If   defective, replace 15A   fuse    (page    4-204). Step    3. Disconnect lead    14    from    left   headlight 15A   fuse. Check for   +12 VDC at   lead 14. . If   +12 VDC is   present, go to   step   4.    If   no   voltage is   present, repair    lead 14   (page 3-2). Step    4. Disconnect ground    lead    from   left   headlight. Check    for   +12 VDC at   ground lead    to    left    headlight. . If   +12 VDC is   present, repair   ground    lead (page 3-2). If   no voltage is   present, go   to   step   5. Step    5. Disconnect left   headlight power    relay   from   connector. Check for   continuity between connector 86    and   ground. . If   continuity is   indicated, go   to   step    6.    If   no   continuity is indicated, repair    ground    lead    (page 3-2). Step    6. Disconnect left   headlight power    relay   from   connector. Check for   +12 VDC at connector 30. . If   +12 VDC is   present, go   to   step   7.    If   no   voltage is   present, repair    lead    20    (page 3-2). Step    7. Disconnect left   low/high beam relay   from   connector. Check for   +12 VDC at connector 30. . If   +12 VDC is   present, replace left   low/high beam relay (pages 4-197, 4-198). If   no   voltage is   present, go   to   step   8. 3-30