I just got my '73 CS back from the mechanic, during which I had a motronic 3.5 and a manual tranny installed. Somewhere during the process, the turn signals stopped working. I'm going to try to troubleshoot the signals myself (slooow mechanic). I'm not sure if the relay is shared with other accessories (eg. emergency lights). If so, then it appears that the relay works, as the emergency lights and intermittent setting on the wipers works. If not, then I guess it could just be chalked up to a bad relay. Right now, it's not activating the turn signals or the corresponding lights on the speedo gauge.

Anyone recommend a good place to start and/or tips?

Thanks a bunch!