last night on my way home my 95 CTD temp gaguge started to move speraticly going from 1/2 gaguge to cold when i got home i checked the fluid i was a little low so i filled it and it was cold in the radaitor i have never had any problems like this b4 i reciently cleaned all the grounds i am woujndering ig this is a sender, ground ishue or what

 

it sounds like you have a problem with electrical just check all your wires and connections or maybe your sensors bad just check it.