check the interior light fuse...theres a fuse for tha headlights, and theres a fuse for interior lights...bac in tha day we did those 30 dollar glo guages on my corolla, and we couldn't figure it out, for days...turns out tha int lights fuse burnt out and there was no problem after that...i don't know if this is safe, but i remember we upped tha wattage on that fuse cus it kept blowing...DONT TAKE MY WORD on how safe it is, but thats wut we did...neither TN or myself are not responsible if u up it and melt ur shit

peace