AC and Heater Relay???
 

Which relay is located behind the dash for AC and heater to control climate controller? My AC and Heater is not working! Need relay. I have everything assemble but missing a relay which is behind my CD player? I need suggestion.

I believe the relay for your a/c is in your engine bay and not behind the dash. Have you checked inside the fuse box (located just behind the battery)?

Climate controll
 

Missing a module behind the dash for controlling Climate controll???? Help or suggestion. I look check the engine bay for the AC relay but it not that.

Two possible ways to determine the problem quickly/efficiently would be to either find another Mkiv Supra owner in your area that is willing to let you take his/her dash apart so you can compare yours to his/hers ... OR ... get a set of TSRMs for your Supra so that you can compare the step-by-step instructions of the dash disassembly to what you find in your Supra.

Unfortunately, it'll probably be very difficult for anyone to determine exactly what you're missing from reading a few typewritten words. Could post some pictures?

Here are a couple of behind-the-dash pictures for your reference:
http://www.mkiv.com/techarticles/rac...tall/RL007.jpg
http://www.mkiv.com/techarticles/rac...tall/RL008.jpg

Again, if you could post some of your own pictures that would probably help to figure out what you're missing...

On the top of your deck.
What is the Below Antenna Box(brown)? What sensor is that(white)? that is what im missing?

Actually it's not my deck, nor is it a picture of my Supra. Either way I think it may be the abs ecu (or possibly traction control related), but I'm not 100% sure. I know you could find out exactly what it is in your TSRM. Also, next time I'm inside my dash, I'll be sure to check for any label/printing on that device and post it in this thread.

Fwiw, I can say I'm about 98%+ confident that white box has nothing whatsoever to do with your heater or your a/c...