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. WIRE NO.  1016 CONTINUITY TEST (1) Unplug horn relay. (2) Disconnect horn button ground wire no.  1435 from ground. (3) Set multimeter to ohms. (4) Place positive (+) probe of multimeter on wire no.  1016 at HORN relay. (5) Place negative (-) probe of multimeter on wire no.  1435. (6) Press horn button and check multimeter for continuity. (7) Connect horn button ground wire no.  1435 to ground. (8) Plug in horn relay. WIRE NO.  1016 VOLTAGE TEST (1) Turn ENGINE switch to ON position. (2) Place positive (+) probe of multimeter on wire no.  1016 at horn button. (3) Place negative (-) probe of multimeter on ground. (4) Press horn button and look for 10-14 volts on multimeter. (5) Turn ENGINE switch to OFF position. 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. Check ground wire no.  1435 from horn button NOTE for loose connections or damage. 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. Change 2  2-495