G'day all. First time poster.

I have a BF GT MK2. When I start the car the horn and cruise control on the steering wheel work but after about 5min driving both stop working but the volume control still works on the steering wheel.

I have no idea where to start looking to fix this so any help will be appreciated

indicates clock spring -check horn relay circuit/switch circuit for earth when pushed before then after fault is present with a test light (multimeter can still read even if faulty)