Unfortunately I don't have access to much info. On renaults, but the diagnosis for the horn is pretty much the same for all vehicles. First start with the fuses (since not sure which one, just check them all with a tester, quick and easy), if fuses good then test the horn relay. If relay and fuse is good then test for power at the horn. If its not getting power then switch on steering wheel is probably at fault, if power is at horn but not sounding then horn itself needs replaced.
Wednesday, July 14th, 2010 AT 3:07 PM