65 Valiant Turn signal cancellation

Stock steering wheel? Some aftermarket wheels are a bit sketchy on the way they trigger the turn signal switch. As Darter6 mentioned, if the switch works good otherwise, you can replace just the cancel cam with the kit he mentioned. I've done it several times with mostly good luck too. Some switches are too brittle, warped, or otherwise not repairable, but, most are if you're careful in replacing that cam.