I have a 98 A4 1.8TQM with about 130k. About a month ago I noticed an odd electrical problem that I can't figure out. The horn no longer beeps when the alarm is activated or deactivated, and the dome light does not come on when the door is opened (nor dim/off when it closes). Otherwise the alarm works correctly and the dome light functions when manually switched on. I can't find in the fuse diagram where one fuse seems to address this problem so I haven't looked at the box yet, but I've got no idea where else to look.
Any suggestions before I go visit my mechanic?
Thanks, Eric