Converting normal aircon to climate control Options

[S8S8]

I know there's a great thread started by Cavegod on fitting climate control to a non-aircon Celica, but I'm looking to convert a normal aircon Celica to climate control.

Has anyone done this before? Cavegod's thread should be of great assistance, but I'm guessing my conversion should be a little more straightforward since I already have aircon.

I have a JDM SS-II front cut, so I know I have all the necessary parts, but I also know that it's definitely not just plug and play! Here's a few observations so far:

• The two aircon compressors appear to be exactly the same, right down to the same three-pin plug.
• Both dash units use the same plug (see first picture below) however the JDM harness has a lot more wires going into the plug. It seems my standard harness does not have the additional wires needed to run the climate control

Here's a pic of the back of the two dash units, with the standard aircon unit on top and the climate control unit below. The middle plug on the standard unit is just for the fan speed control dial, which is not used on the climate control unit.



And here's the front for anyone who is unsure of the difference:



I'd love to hear from anyone who has done this swap or knows anything about it.

Thanks.

[S8S8]

I've done a bit more work on this now that my interior is completely stripped out. I've replaced the fan box, heater box and whatever the box is in the middle that the air con pipes run into. Everything plugs in where it should, but that's to be expected since I've also swapped the whole interior loom from the donor clip.

I can't test the air con side of things yet since my engine won't start and there is no air con gas anyway, but I have been able to test the rest of its functionality. The controls for where the air runs to work fine, and the little flaps are moving as they should, but the actual fan won't run at all. I haven't connected up the temperature sensors yet, but I don't think that would stop the fan from working.

Unfortunately I didn't check the operation of the fan whilst it was still in the donor clip, so I can't be sure if it was working in the first place, but it doesn't seem like something that would break.

Anyway, I'll keep toiling away and hopefully I'll be able to put together some good info for anyone else contemplating this swap.