If you have a 12 volt tester, locate the hot lead on the switch and disconnect it to see if the light goes out.
If you have a factory manual, there's wiring diagrams in there to show you the wire colors on the switch. If not, you should entertain the thought of getting one.
If you have a factory manual, there's wiring diagrams in there to show you the wire colors on the switch. If not, you should entertain the thought of getting one.