TM 9-2320-363-20-1 Table    3-1. Troubleshooting (Cont) Malfunction Test   or   Inspection Corrective    Action ELECTRICAL    SYSTEM   (CONT) Auxiliary Light   Circuits    (Cont) 1. NONE OF THE AUXILIARY LIGHTS OR    ACCESSORY CIRCUITS OPERATE. Step   1. Check   for +12 VDC at auxiliary light power bus. . If   +12    VDC is  present, repair    auxiliary    light   power bus (page 3-2). If   no   voltage is   present, go   to   step   2. Step    2. Disconnect auxiliary lights power relay. Check for +12 VDC at connector 30. . If   +12 VDC is   present, go to step 3. If   no    voltage is present, repair    lead   420JC (page    3-2). Step    3. Check    for   +12 VDC at auxiliary lights power relay connector 85. . If   +12 VDC is present, go   to   step   4.    If   no   voltage    is   present, check dome/auxiliary/f lasher 15A fuse. If    defective, replace 15A fuse (page 4-204). Check for continuity in lead 420JA and lead 420J. If    no continuity is indicated, repair lead 420JA or 420J (page 3-2). If    +12 VDC is   still not present at connector 85, replace vehicular light switch (page 4-170). Step    4. Disconnect auxiliary lights   accessory lockout   relay.    Check for +12 VDC at connector 87. . If   +12 VDC is present, go to step 5. If   no    voltage is present, check lead 420JB for   continuity.    If   no   continuity is indicated, repair lead 420JB (page 3-2). If    voltage is    still not present at connector 87, replace auxiliary lights power relay (pages 4-197, 4-198). Step    5. Disconnect auxiliary lights accessory lockout relay. Check for +12 VDC at connector 85. . If    +12 VDC is    present, go to step 6. If    no voltage is present, check start/auxiliary 15A fuse. If    defective, replace 15A fuse (page    4-204). Check for continuity in lead 71AA and lead 71A. If    no continuity is indicated, repair lead 71  AA and lead 71A (page 3-2). If    voltage is still not present at connector 85, replace vehicular light switch (page 4-188). Step    6. Disconnect auxiliary lights accessory lockout relay. Check for continuity from connectors 30 and 86 to ground. . If    continuity is indicated, go to step 7. If    no continuity is indicated, repair connector lead 30 or connector lead 86 to ground (page 3-2). 3-47