Eatc temperature display change

[Omega]

Hi I have a 93 atx that I just replaced the old eatc to the hard button style part no. F4dz-19980-a. I've spent hours searcing on google on how to change the display to celcius. Nothing I have found seems to work.
I have tried the max ac and defrost as well as the auto and defrost floor but no change.
Any ideas would be appreciated

 

[hawkeye18]

There is a wire that comes out of the connectors that you need to either ground or unground to change the display units. I believe it's red. Lemme look it up and I'll post the relevant data for you.

Yeah, it comes off of pin 20 (I don't know which connector, just look for a little red wire that is taped to the harness). If is taped to the harness (ungrounded), it displays F. If it is grounded, it displays C. So find a grounding point (any metal) and attach that wire to it somehow. Shouldn't be too hard, I bet Ford built a method of doing it into the wire.

 

[the4biddendonut]

Did your old one read Celsius??? To me it sounds strange if you changed your EATC and it went from reading Celsius to Fahrenheit.

 

[Omega]

Thanks for the info on the wiring. I will have a look at that this weekend when I get time.
As for the old eatc it was in fahrenheit as well. I replaced it as the old one had smashed in buttons.