Temperature guage not working

[Globalsilence]

I just bought my 1995 240, it's an SE 90,000 miles, black leather, great deal. The temperature gauge worked the first night I drive her, the car actually got very hot because the electric fan wasn't grounded properly, and I fixed that and now it works. Anyways the temperature gauge doesn't work so tried a few things. It started working for about an hour and went up to the middle of the C and then just stayed there even after sitting overnight. So I unplugged the wire going to the sensor, then I grounded the wire and the gauge went up and down like it should when it was grounded, so I know it's not the gauge or wire, or at least it shouldn’t be that. So I replaced the temperature sensor and still it won’t read. Is there anything else I need to check to see if it will work?

[Pacman]

You have coolant in hte system right? I know it sounds dumb, but if there isn't any coolant, the gauge won't read anything. If not, look into a FSM to see how you test the gauge.

[Globalsilence]

Yeah there is plenty of coolant in the system. The car runs great, the fan comes on, the guage just doesnt read.

[kandyflip445]

The connectors in the plug may be worn. Try giggling it around. You may be able to get a new connector at NAPA or the dealership. If not there you could get one from a junkyard. Good luck.