My Hazards Dont Work?? Can Anyone Help Plz?

HI ALL

MY 89 CAB HAZARDS DONT WORK THE GREEN LIGHT ON THE DASH COMES ON BUT THATS IT IVE CHANGED THE SWITCH AND RELAY AND STILL NOTHING  IT WORKS TO TURN LEFT AND RIGHT BUT THATS IT ANY IDEAS WHAT MIGHT BE WRONG
   
THANKS GUYS

Check fuse then bulbs.