TM 9-2320-363-20-1 Table    3-1. Troubleshooting (Cont) Malfunction Test   or   Inspection Corrective    Action ELECTRICAL SYSTEM    (CONT) Auxiliary Light    Circuits (Cont) Step 7. Check    for   +12 VDC at   auxiliary light power bus. . If   +12 VDC is   not present, check    for   continuity    in   lead   420JD. If   continuity is   indicated, replace auxiliary lights   power    relay (pages 4-197, 4-198). 2. NO POWER TO AUXILIARY HEATER FAN    POWER RELAY. Disconnect auxiliary    lights   accessory lockout    relay    and    heater fan   power    relay.    Check for   continuity in   lead    71AA. . If   no   continuity is   indicated, repair lead    71AA (page    3-2). Worklight Power    Receptacle Circuits 1. NEITHER WORKLIGHT POWER RECEPTACLE OPERATES. Step 1. Check    worklight    receptacles 15A   fuse. . If   defective, replace 15A   fuse    (page 4-204). Step 2. Check    for   +12    VDC at   lead    420JD from   auxiliary light   power   bus. l If   +12 VDC is   present, go   to   step    3.    If   no   voltage    is   present, repair lead    420JD (page    3-2). Step 3. Check    for   +12 VDC at   lead    73F    for   left   and    right   worklight    power    receptacles. . If   +12 VDC is   present, repair ground lead from worklight power receptacles (page 3-2). If    no voltage is present, repair lead 73F (page 3-2). 3-46