Fog lights provided additional visibility when driving through heavy fog or rain. The Toyota Tundra's fog lights are mounted on the lower edge of the front bumper cover. They are controlled by the fog light switch located on the steering column.
Inspect the turn signal stalk to find the fog light switch. It is affixed to the edge of the stalk. Turn the fog light switch forward to turn on the fog lights or turn it backward to turn them off. As long as there isn't a problem with your Tundra, using the switch should operate the fog lights.
If turning the fog light switch back does not turn off the fog lights, there could be a problem with the fog light switch. Because the the switch is integrated with the turn signal stalk and headlight switch, the entire combination unit will likely have to be replaced. This requires disassembling the steering column to access the switch's mount.
Ideally, you will test the switch prior to replacing it. An automotive voltmeter or similar tool can do this. If there is no problem with the switch, search for a short in the electrical wiring. This process can be tedious, but once the short is located, the wiring can be repaired, restoring the fog light's operation.
