Turn signal relay...
 

1975 911s....Turn signals not working . Is there a simple test to check if the turn signal relay is good or bad? Thanks

If you have a voltmeter or test light you can test the relay. First, find the flasher relay. Unplug it from it's socket. There should be 4 pins C, 31 49,49a. put a small piece of masking tape on the top of the relay and mark on it where each pin is...C,31,49,49a. Plug the relay back in about half way so you can stll see each contact. turn on your emergency flasher button and you should observe 49-12v(or test light on), 31 ground (or test light off), C switching between 0 and 12v (or test light flashing, 49a flashing between 0 and 12v (or test light flashing). If this is correct, your flasher relay is good. Next, turn off the emergency flasher, turn your key to accessory and turn on either turn signal. You should get exactly the same.

Flintstone, thanks. I'll test this weekend...

Usually if your emergency flasher works, the relay is ok.