That right the horn stops when the key is in ignition : I will disconnect the battery for few minutes
and I will see

I checked this week end the door & trunk switches...but they are all operational.
I haven't no message on the ODB.
it's a real mistake! except, if the contactors in the steering wheel are broken

Alex

Hi everybody , We have just arrives in the US few weeks ago (I’m French) : I bought a Volvo for my wife : At date, we have a problem with our XC70 -2002 – 95 000 miles: the horn blows continuously when we pull off the keys of the contact (when the key is on the contact ignition we have no problem) ....