[dmjlambert]

My 70 Olds Cutlass had what looked like a standard flasher, but it was fastened to a metal plate next to the ash tray and had a two-wire connector going to it. I took it off of the metal plate one day to look at it and wonder why it was there, and it quieted down significantly and stopped making the "TEE-KU" sound. I put it back. When I needed to replace it, the one I got from the auto parts store did not have the tab necessary to fasten it to that plate, so from that point on the turn signal was quiet.