I've got a quick question. Wanting to do some maintenance on my own and I've got the perfect candidate I think. My temperature guage (the one in the dash) is stuck at cold. I know it's not the engine, the engine is fine. The needle was jerky for a while and it's just stuck completely now. My mechanic said the contacts are dirty and he's cleaned it once for me and fixed it temporarily. I can't find where it plugs into anything to clean it again myself though. Can someone walk me through it?

Josh