MY BATTERY IS FAIRLY NEW BUT HERE IS WHAT IS HAPPENING...
Headlights do not turn on when i switch them to on position but then they work when i switch them to off position. I had to pull the fuse to prevent battery from going dead ... because even when the headlights turned themselves off (when the switch was in the on position due to this malfunction) the interior lights stayed on.
Then after I pulled interio lights fuse, approx. 10 minutes later the horn started to run constantly until i had to pull that fuse....
PLEASE HELP.
It rained hard today, otherwise car has no water damage history...