My Jeep WK1 has returned after the summer break with some random blowing again.
Looking at the fuses and relays I decided to remove the fuse that says Horn in the owners handbook. Sure enough the horn stopped working but so did the nearside front indicator lamp and the electric windows. Replaced the fuse and removed the horn really - that has shut it up but not Mot legal as the horn is not working.
That leads me to the mystery of why fuse 16 in the integrated power module fuse box when removed stops the front n/s indicator lamp & electric windows from working?