The Horn on my F-250 Diesel starts blowing in short bursts all by itself I have to pull the horn relay to get it to stop , this happens from time to time . Also my factory Radio/CD changer will only play on one side of the speakers at a time at normal volume , it will switch to the other side by itself and do the same thing . I have taken it back to the Dealer twice with no help at all . Please help any advice will be welcomed

have you tried to replace the relay yet?? do they both act up at the same time??

have you tried to replace the relay yet?? do they both act up at the same time?? Yes I have checked the relay and it is good , and both problems will show up at the same time . The radio problem will show up by itself