CONTINUITY TEST CAUTION Electrical   power   must   be   disconnected   from   circuit before continuity can be checked failure to comply may result in damage to test equipment or electrical system. (1) Disconnect wiring from components at each end of wire. (2) Set multimeter to ohms position. NOTE A reading of infinity indicates an open circuit. (3) Connect multimeter leads to each end of wire and check multimeter for continuity. NOTE Any reading besides infinity indicates a grounded wire (4) Remove multimeter lead from one end of wire and connect to chassis ground TM 9-2320-360-20-1 WARNING Jewelry  can  catch  on  equipment  and  cause  Injury  or  short across electrical circuit and cause severe burns or electrical shock.    Remove  rings,  bracelets,  watches,  necklaces,  and any other jewelry before working around HET Tractor. Check ground wire no.  1435 from HEAD LTS relay for loose connections or damage. DIMMER RELAY TEST (1) Turn ENGINE switch to ON position (2) Place headlights switch in the on position (3) Place headlight dimmer switch in the low beam position (4) Place positive (+) probe of multimeter on wire no. 1435 at DIMMER relay (5) Place negative (-) probe of multimeter on ground and look for 10-14 volts on multimeter. (6) Place positive (+) probe of multimeter on wire no. 1006 at DIMMER relay (7) Place negative (-) probe of multimeter on ground and look for 10-14 volts on multimeter. (8) Place headlight dimmer switch in the high beam position (9) Place positive (+) probe of multimeter on wire no. 1007 at DIMMER relay (10)   Place negative (-) probe of multimeter on ground and look for 10-14 volts on multimeter. (11)   Place headlights switch in the off position. (12)   Turn ENGINE switch to OFF position WIRES NO.  1006 & NO.  1007 VOLTAGE TEST (1) Turn ENGINE switch to ON position (2) Place headlights switch in the on position (3) Place headlight dimmer switch in the low beam position (4) Place positive (+) probe of multimeter on wire no 1006 at headlights (5) Place negative (-) probe of multimeter on ground and look for 10-14 volts on multimeter. (6) Place headlight dimmer switch in the high beam position. (7) Place positive (+) probe of multimeter on wire no 1007 at headlights. (8) Place negative (-) probe of multimeter on ground and look for 10-14 volts on multimeter. (9) Place headlights switch in the off position (10)   Turn ENGINE switch to OFF position. Change 2  2-533