Thought I'd post this for posterity since my searching didn't turn up year, model, problem resolution.

Recently, I lost function of brake lights, turn signals, and hazard flashers. All happened at the same time. Some threads discuss flasher relays, short steering column wiring (position of steering wheel), and fuse failures.

I checked #18 fuse and a few others. All had continuity. I assumed my bulbs were all good. My hazard push-pull switch did not feel right. There didn't seem to be engagement. At this point, there was a good chance that the multifunction column switch had failed so I decided to try replacing it.

I'm happy to report that this switch was the cause of all the light function failures and now, all is well again.

Removal is done by prying the key lock switch cover off,, removing three 1" philips head screws that attach the lower column shield to the upper shield. At that point the upper shield can be completely removed. The lower shield was not totally removed because the tilt lever **** was left on. The switch is attached to the column with two 3/4" Torx 20 fasteners. The upper is easily accessible and the lower fastener can be removed by pulling the lower column shield down so access can be achieved. The two wiring harnesses have a conventional harness lock to depress and the connectors pull outward from the switch. Installation is the reverse of removal, noting the dowel locator and small plastic dowel on the lower shield.

Hope this can help other Super Duty owners that simultaneously lose these light functions.

 

Thanks for the heads up...