1995 Other Nissan Models Dimmer Switch Replacement

Hi -

Any idea on how to replace the dimmer switch of a 95 200sx. I was driving to work the other morning and the dash lights flashed off and on a few times then stayed on as they are suposed to. All other interior and exterior electrical is working fine. I have already checked all fuses and battery cables. After some checking I found out that the dimmer switch (wheel), going bad can cause this problem and is only about $30 for a new one. It looks like it just plugs in but I have no idea how you get the old one out. Any tips would be greatly apreciated. Thanks!