The Stovebolt Site Forums The Shop Area General Truck Talk temp guage

My truck has the warning light temp guage. In the morning the cold light is on when I start it. The light began to work intermitently and then died. I cleaned the contacts on my temp sending unit and coated them with dielectric grease and hooked everything back up. The cold light worked on occasion and it has went out again. The bulb is good, I pulled it out and looked this last time. My question is this a bad sending unit (the contacts were almost beyond help) or do I need to swap out the contacts in the plug because they are corroded too? And how do I get the contacts out of the plug with out breaking it into pieces? Thanks in advance,
Drew