Replace dash lights

Most toyota dash lights are good for a minimum 10 years. My 1995 lexus lights are still going strong. You may have a problem with a fuse, so check that. Also, sometimes the connections will loosen and result in the light gradually going out (over months). What I was told for my lexus, may work for your corolla, so here goes. On the side where the lights are dim (or out) strike the top of the dash. Don't break anything, but give it a firm rap a few times. This may shake the connections enough to reseat the connectors and give you the light you need.

To remove and replace the dash lights require you to take the dash display out of the car, and remove / replace lights. It's generally not a task for a weekend mechanic, who needs the car to get to work monday thru friday. You have to remove the covers around the steering column and there are clips and screws holding the dash in place on the rear of the display. Also, take off all the electrical and speedometer cables. Be sure and mark everything so you put it back correctly. Good luck,..