Horn and wipers stopped working?

[1985michael182]

Horn and front wipers have stopped working. Totally stock 172. Rear wiper still works and washer jets still work.
Fuses all OK so I'm lost now...
Any help/ideas appreciated
Thanks Mike

 

[1985michael182]

Update

Horn was corroded connections on the horn.

Fog lights was a white wire broken on the selector stork