If it lights up on the hazzard flashers then it would have to be the turn signal switch. Thats because both the turn signal and hazzard circuts share the same wires from the switch to the lights out front. It just changes the power source that feeds it in the switch. Turn signals are ign feed and hazzards are hot all the time. If you can get a wiring schematic just find the right color feed to that front circuit and test it at the switch for 12 volts coming out of it with the key on and turn signal on. If it has no power like that it is the switch since the other lights work and share the same feed. Ron