My turn signals will not work with the engine running. With the engine off they will. With the engine running if I move the ignition like I am going to turn it off they work.. any Ideas is it the ignition switch or ign cylinder

 

What year and model truck?

 

It is a 1984 ford f150 xlt 302

 

After you start it, wiggle the keyswitch to help seat it. This is a common problem with those trucks. If you put a new ignition switch on the column underneat the dash and wd40 the upper portion where the key goes in, it usually fixes it.

 

Thanks for your help. I will give it a shot.

 

New turn signal switch and ignition switch fixed my issues.