Have '98 Sable, need to know how to change light switch. Where can I find directions?

The lights stay on all the time. Have to disconnect battery to cut off.|||take the bulb out of the overhead unit that way it wont stay on all the time sounds like you have the switch turned on to the left all the way like you wanted a brighter dash lights make sure this didnt happen.ok and if you have the knob that goes up and down next to the light switch make sure its not up in the full position good luck the way to take the switch out of the dash is to take the battery gnd off the terminal pull the light switch all the way out and on the switch *** itself is a spring button on the underside of it under the dash push it in and remove the shaft up pulled out before that shaft will come out in you hand u will now see the nuts which hold the switch on the dash undo the switch will now fall into you hand get the new switch reinstall the way you took it off reinstall the shaft into the switch and reconnect the battery cable good luck|||Well if you sure its not a relay try autozone online or get a book.I believe that one is mounted on the wheel.