Where is the dimmer switch located in the 2010 Toyota Corolla?

On a 2010 Toyota Corolla to locate the dimmer switch look at the lower-left corner of the dashboard, next to the fuel meter. You see the letter PUSH ODO/TRIP. You will see a tiny long rod, this is the dimmer switch. Turn that rod to adjust the brightness .When the normal lights are turned on, the dimmer sends a small current to an electric switch called a relay. This current closes the switch, turning on the normal headlights. When the dimmer switch is turned to high beams, it triggers a different relay, turning on the bright high beam headlamps.