Toyota Repair: Driver side turn signal

Question
So, I have a 1991 Toyota Corolla DX. I have no driver side front turn signal. I've replaced the bulb, and it's obvious it's not the fuses since all the other turn signals work, as well as my hazards and the horn. It's simply just that one signal. Any ideas on what this could be?

Answer
hello, it sounds like there is either no voltage or a ground connection to the bulb socket, first remove the bulb, turn the turn signals on to the left, use a 12 volt test light or a voltmeter, ground the negative terminal to a metal part on the body, connect the pos connection to one of the bulb contacts, either one, one should make the light flash, does the light flash?
If yes, connect the test light/meter across both bulb contacts, does the light flash, if not it's a bad ground, turn the power off anfd use the ohm meter connect it to ground and check each bulb socket, only one of them should show about zero ohms, if not it's a bad ground, check the white black wire, it is the ground wire.
If there is good ground but no voltage there may be an open circuit between the switch and the bulb, if thiat side does not work with the emergency flasher either it's an open circuit or bad ground.