There are good instructions on how to test it here: http://www.moparmusclemagazine.com/techarticles/interior/23241_instrument_gauges_repair/index.html Gary H. harry skalla wrote: > > Clear DayI have a problem with my temp. gauge. when I turn on the key, > the > needle goes all the way over to hot and stays there till I turn the car > off. > Is there some way to test if the sending unit is bad or something is > wrong > with the gauge. The sending unit is new, but sometimes they are > faulty... > Butch > 1964 Dodge 440 > > ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.