yesterday night i turned on my headlights and when i turn of the the lights the lights turned of but the dash lights stayed on untill i took of the key of the ignition it never did this before another thing when i tye to dim the dash lights it dosent dim and when i turn the dim switch all the way to the low side the lights in the dash will turn of fine with the light swicth could this be the dimmer switch or wat could be the prob