TM 5-5420-226-20-1 DETAiLED TROUBLESHOOTING PROCEDURE SUPPORT SYSTEM -  VEHICLE LIGHTING Symptom-60 PANEL AND    DRIVE LIGHTS ARE   VERY DIM   OR   WILL NOT   LIGHT WITH PANEL LIGHT SWITCH AT    BRIGHT, DIM, OR    PARK (LIGHTS ARE OK   WITH PANEL LIGHT SWITCH AT    OFF). ~NOTE This   procedure is to  be  performed by two persons. The lead person is referred to  as  the  first   technician and shall  direct   the  activity    of  the  second person    called   the  second    technician. ) 9 Check   if  vehicle    lights   work   after   disconnecting front accessory harness connector (CKT   40)   from   basket- indicator panel    harness connector at  basket disconnect. First l l l l Technician (Operator’s Station) Set   MASTER BATTERY switch OFF. Disconnect front accessory harness connector (CKT 40)    from basket-indicator panel harness connector at basket disconnect (top    connector). Set   MASTER BATTERY switch ON, On    LIGHTING CONTROL switch, turn ON-OFF lever    to   SER DRIVE and turn PANEL lever    to   BRT Second Technician (Front of   Vehicle) l   Visually   check   if  service   lights   are    working properly m    ?’”’22$’( i- ~cd EiPt ,y” MASTER CONTROL ? - PANEL 4 FOR   CLARITY QUADRANT I I . Are   vehicle lights   working properly? ASSEMBLIES NOT   SHOWN Check   front   accessory    harness (CKT   40)  at  basket   disconnect for   short   to  ground. . 0 l   See  Step 10 . \ TA107291 . 4-602