My car is an 89 , my horn and central locking button 20 amp. on the dash no longer working, I know the horn is no.11 in the left footwell box, however the fuse is good and the wiper motor which is also no.11 is working.
Check the other two fuse boxes?
I have found the answer,Page 23 .drivers handbook.There is no fuse directly associated with this switch, it controls the doors, windows, trunk, sun roof and fuel cap, so it looks like a busy morning. Thank you all.
You need find a .pdf of electrical guide S65_89 to trace the circuit.
File size too large to post here but a search on the interweb will usually come up with the correct one.
I’m sure Gus has it on his site.