Have my new-to-me 2006 F250 and managed to wire up my back up camera, USB connectors, and run the wire for my microphone. My only hang-up is trying to get the wire to stay up under the headliner. I ran it across under the steering wheel, up the A-pillar, and out behind the headliner and I want to attach it on the side of the overhead console. I tried simply stuffing the cable between the roof and headliner but that didn't seem to work. Trying a non-permanent solution so not wanting to use glue or other adhesive incase I need to replace the mic someday. Had anyone successfully made their mic cord stay underneath the headliner?

 

Try a couple of small pieces of duct tape.