Need some help with turn signal switch

Last night I had to replace the flasher module on my 70 dart. found one for only $3.50 and it was actually made in USA! got it installed and the flashers work,however this morning the turn signal switch wont stay "locked" in the upward postion for making a right turn anymore,I have to hold it up until I am done signaling. Is the issue caused by the switch itself or is there a separate part that I can replace that detains it until the cam cancels it? the switch itself isn't sloppy or loose and it still stays in position for a left turn until it cancels automatically.