by burdar » 06 Feb 2012 14:48
On a non A/C car, it mounts right to the metal dash frame. On an A/C car, it mounts to the extra plastic trim piece that runs across the bottom of the dash.
If you aren't using the extra A/C trim piece, look for some holes in the dash frame between the glove box door and the ash tray door. There will be a large hole for the switch/bezel and some smaller holes for the plastic light housing. There will be two holes for the light housing screws and one hole for the locating pin on the light housing itself.