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Discussion Starter · #1 ·
Broken climate controls are a way of life for most CRX owners. I'm not a fan of the faceplates available to patch up the crumbling CRX controls, so I figured I needed to find a way to swap in a more solid and better looking (IMO) piece.

There is a crude wiring diagram at the bottom of this post.

Here is how I swapped the old broken CRX CC for a the '92 Accord unit.

Tools:
1) various common hand tools: screw drivers, 8mm (glove box) and 10mm sockets, pliers, etc.
2) wire strippers
3) drill motor with sanding disk
4) JB Weld
5) Time and patience.

Credits:
tennesseecrxgroup.com/ has long published a PDF on how to do this mod. The wiring details on the first page are dead on and work perfectly. I'm not sure who did that writeup, but kudos to the author.
Members KUPOP and CYPRESSDOWNS both sent me plugs and wires and are both GOOD SELLERS!! Thanks guys!

Here is my old clunky stock control:



I bought this '92 Accord unit from a guy on CL for $50



I'm not going to go into too much detail about removing and installing, just focusing on the wiring and mixer cables and mods to the control itself.
Unscrew everything:



Take the glove box out:



Move the stereo unit aside and hammer out the old control:



Here is the Accord fan switch plug for visual reference:



Here is the Accord "green" plug for visual reference:



This is the CRX harness for reference:



Being that the Accord controls are more plentiful, and the CRX controls are rare, I opted to clip the plugs off the CRX harness as I figured I'd not ever be going back and re-installing another CRX control.
I first wired up everything, and tested to make sure it worked, and then soldered/shrink wrapped the connections.
If you ever plan on re-installing your old CRX control, you may want to use connectors instead of hard wiring:
Wiring the fan switch. Most all of the wires are the same color, the blue/red wire on the accord plug (5th speed) is not used:



During testing I found that my light circuit for the control knobs did not work. I had to clip the wires off the bulb and hard wire them to the CRX harness. The light wires are the red and red/blk wires. You will almost certainly be able to just connect the red, red/blk wires as shown here:



There is some confusion as to wiring the grn/red and grn/wht recirculation/fresh air connections. The grn/red and grn/wht MATCH between the Accord and CRX. Therefore:
Accord grn/red is attached to the grn/red CRX wire.
Accord grn/wht is attached to the grn/wht CRX wire.
I tried both and visually verified that the operation was correct.



One thing of note is that there are TWO grn/wht wires coming out of the CRX harness. One goes to the recirculation switch and the other to the floor/vent control. If you get them criss-crossed like I did, no big whoop, the world does not end. The recirculation vent just goes into a never ending continuous open and close cycle until you press the fresh air button. If this happens, just switch the grn/wht wires as seen in the diagram at the bottom of this page.



I agonized for days on how to solve the mixer cable dilemma. I concluded that the easiest way is to mate the CRX mixer to the Accord control. So, before you throw out that old CRX climate control, take off the mixer because it may be of use someday.



Take your WMD's and remove the bosses that the Accord mixer screws into. My light circuit was FUBAR so I clipped the light bulb wires as seen here. YOU MAY NOT HAVE TO:



Use your drill/sanding disk to sand the bosses flat:



In order for the Accord knob to fit, you'll have to sand a flat on the CRX mixer shaft. Be advised that even after doing this, one of the tongs on the shaft broke and I ended up JB Welding the Accord knob on:



Glued on:



Moar:



Moar:



Another view of the assembly:



Another/moar:





OK, here's where it gets tricky. You have to re-route the mixer cables OVER the top of the console bulkhead or else your cables will bind. I didn't realize this until after disconnecting the heater valve cable, which makes the mixer operation much easier. It may well be possible to connect both cables without binding, if routed OVER the console bulkhead. Somebody should try this.
I guess I'll just reach down in back of the intake mani and switch the valve on when winter comes (which is rare here in Arizona).









If you grind all the mounting tabs off the Accord unit, it's very easy to take in and out of the console area. I ended up using a combination of silicone and tie wraps to secure the unit.









Note: blk/yel on CRX goes to yel/blk on Accord plug FYI.
 

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I am surpriced this is not on the how to section yet...

Great info here
One thing of note is that there are TWO grn/wht wires coming out of the CRX harness. One goes to the recirculation switch and the other to the floor/vent control. If you get them criss-crossed like I did, no big whoop, the world does not end. The recirculation vent just goes into a never ending continuous open and close cycle until you press the fresh air button. If this happens, just switch the grn/wht wires as seen in the diagram at the bottom of this page.
do you remember if they come from the same plug?... that way it cam be identified wich green/white plug goes to the circulation switch and the vent control, if you know what i mean
 

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Its me DUB said:
nylumiro24 said:
I am surpriced this is not on the how to section yet...

Great info here
It was just posted last night...give em a chance to sleep in mang. :lol:

Great write up! If my control ever breaks, this will be extremely helpful.
hehehe I checked the howto's a few hours ago, lol.....
I guess I am living in the future since I am 8 hours ahead of you guys.... hahahahahha
 

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Great write up! If I ever get around to doing this to mine since my stock climate control has a slight crack, and will likely only get worse; I'll be using this how-to for sure.

Thanks for the kind words too ;) If anyone else needs the wiring for an Accord climate control, get a hold of me. I also typically can get the units as well, but seem to have trouble finding the knobs. Either get a hold of me for those as well or check the FS forum.
 

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Mine is broken for sure. I went to the junker and got one off of a 4dr and found out it wont work. Lucky for me I have an CB accord parts car in my yard that I can snag this off of. Nice DIY and I will definately be using this write up!
 

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Discussion Starter · #18 ·
Sorry guys, I know this is an old thread.
The reason I didn't use the Accord mixer is:
1) Because the gearing is reversed and hot would be cold, etc.
2) Also because the CRX has two cables where the Accord uses one.
3) The CRX mixer already has the mounts for the cables as the Accord unit does not.

If you look at the pic of the two mixers together you can see that the cable "arms" point in different directions. Using the Accord mixer as-is means having an ultra long cable to facilitate reaching all the way around to the other side of the unit.
Retro-fitting the CRX mixer, although labor intensive, is a more "plug and play" option.

I think the writers of the .PDF flipped the Accord mixer upside-down to make it work. That's a great idea, and just a matter of what you feel comfortable with as far as mods go. I think using the old CRX mixer was a better choice for me, but that's just my opinion.

Keep in mind that at the time I posted this, most of the questions I encountered involved how to wire the unit and so I focused on that, primarily with photos of what I had done.

Random photo of notes I took:

 

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i got the mixer and im ordering new knobs right now before i do this. thank you so much!

if it turns out great, ill probably swap my wifes uncracked climate control and sell the 3 extra uncracked climate controls we'll have haha
 

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I'm just wrapping up my conversion. My CRX Si is using a Civic harness (long story), so this write-up is an excellent reference! :)b

My only criticism is the use of JBWeld on plastic - I love JBWeld but I think normal epoxy is a better choice.

Q: Is there anything that J-B Weld WON'T bond to?

A: J-B Weld will not adhere to, or bond well to:

* Any flexible rubber surface
* Leather
* Vinyl
* Canvass
* Polypropylene plastic
* Polyethylene plastic
 
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