There is no separate switch for it. Pushing the light switch will defeat the dome and courtesy lamps.
walmart
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dash dash
Usually on the dash to the right of the steering wheel.
On the brake pedal assembly.
With an OBD2 scanner.
Just unscrew it.
Have vehicle scanned to determine the problem
A mercury switch is used for connecting current to a under-hood/hatch light.
This indicates a no-charge situation. Most likely the alternator is bad.
You have to remove the instrument cluster to get access to the bulbs.
have vehicle scanned to determine problem