Heat gauge

[MELVIN DODS]

I have a heat gauge problem on my 55-272. Needle goes to cold when switch is on, when started will gradually go to hot as you drive it. Checked it and it's not hot, it runs 160 right where it should be. Put in a new sending unit and ran a new wire from it to the gauge with still the same results. It calls for a sending unit in one bank and a 2 terminal thermal switch in the other but it doesn't have the thermal switch. Would it have to have the thermal switch to get the proper reading?

 

[CrownVic55]

Melvin, the 2 terminal switch was only for flathead v8s. The single contact sending unit should be in the rear of the left (drivers side) head. Did you make sure the sending unit is proper voltage? Is car still 6 volt? Try pulling lead off of the sending unit with key on and see what gauge does. Post results.