Sonata speepometer

My 2003 Sonata speedometer has been acting up lately. I t sometimes will quit working when you turn on the headlights. Had it to the dealer anand of course he can't find anything wrong. Anyone had this problem or have any ideas???? Thanks

check the wireing,

the headlamp switch and the speedometer share a common ground point g04 located behind the crash panel . a poor ground can cause the condition that u stated .

Dealer fixed problem. Headlight switch bad ground. Thanks