01 F150 - Turn signals intermittent & engine start

I have a 2001 F150 Supercrew, 5.4 - the turn signals sometimes work and sometimes not, sometimes they just buzz continuously. If I jiggle the turn signal they will work normal sometimes. Equally strange sometimes when I turn the key the motor d/n turn over - nothing. I have to move the shift indicator to neutral and them back to park and then is turns over fine. I don't suspect a starter or battery issue. Is there a switch or control module in the stearing column that controlls these things help. Thanks in advance.