Automotive Air Conditioning Information Forum (Archives)

nickwest on Mon December 06, 2010 1:18 PM

Year: 1989
Make: TOYOTA
Model: HILUX XTRACAB
Engine Size: 2.4L
Country of Origin: Italy

Hi all;
I'm rebuilding an old truck toyota 1989 hilux;
I've buyed an used A/C kit with all parts;
originally the truck wasnt equipped with a/c,
I have studied the Service Manual many times but I cant understand where/how the COOLING UNIT
http://personal.utulsa.edu/~nathan-buchanan/93fsm/airconditioning/3systemco.pdf
wire cable can be connected to the CAR wire harness;
here the pic of the COOLING UNIT connector:
Thanks to everyone can help me; my mail nickvandeerpeers@gmail.com

TRB on Mon December 06, 2010 2:02 PM

Unless you have all of the wiring I would consider a preset thermostat to cycle the clutch. Same goes for the HPCO. They are universal options which might be the best route if all the wiring is not available for the truck. Which is what I'm assuming since you are asking how to plug these connections together in the first place.

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NickD on Mon December 06, 2010 4:38 PM

All the parts would include the climate control, amplifier box, and the wiring harness, do you really have all the parts? This is just under the dash, of course, even more stuff under the hood. A service manual sure helps. And if this system was left open for awhile, could be history, never reuse an old receiver. If converting to R-134a, not recommended, will even have more problems.

nickwest on Mon December 06, 2010 6:10 PM

Thank you for quick replay;
@TRB ; yes I have all the parts as here show: http://personal.utulsa.edu/~nathan-buchanan/93fsm/airconditioning/3systemco.pdf
someone linked to me this:
- http://www.ackits.com/pdf/16873.pdf
- http://www.ackits.com/pdf/2037.pdf
The PDF 16873 can be the right way to install these system?
@ NickD please can you explain me why "never reuse an old receiver"? What is the problem you talking about?
I dont know what type of GAS was in the system before; its absolutely necessary to convert to R-134a?
Thank You for answers.
Nick

TRB on Mon December 06, 2010 6:17 PM

In your PDF I do not see any wiring what so ever. As Nick stated, do you have all the wiring and modules to control the computer and various other components? If not I return to my original statement.

That evap assembly looks like it needs a cleaning and I would check it for leaks before installing.

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NickD on Mon December 06, 2010 10:01 PM

Original system was R-12, Toyotas' do not convert very well to R-134 for this era. Receiver has a dryer element that would be well saturated at this point, even good to change it when opening the system for any reason. Did this system have a charge in it when you removed it? It does look pretty bad to me, (and Tim), could be a long time consuming effort. System is already over twenty years old and can only wonder how many miles on it. Clutch wear on the compressor is also a good sign for excessive wear, can you even hand turn the compressor? Should rotate with very little effort, like less than a couple of foot pounds of torque with no drags throughout the rotation.

NickD on Tue December 07, 2010 7:00 AM

Furthermore, in that era, was quite common for dealers to install AC systems from a factory kit, that evaporator housing can be of some value to you. Can buy a new evaporator and a TXV from ACKits and make it like new again.

nickwest on Wed December 08, 2010 4:55 PM

Thank you for reply; I'll do what do you say me.
Best Regards
Nick

TRB on Wed December 08, 2010 11:13 PM

We don't ship outside the US. But I would suggest checking all the parts for their usefulness.

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NickD on Thu December 09, 2010 5:46 AM

Whoops, didn't catch that Country of Origin: Italy, I have heard of Italy.

mk378 on Thu December 09, 2010 8:10 PM

The dealer kit included a wiring harness that connects all the A/C parts together, then plugs into the truck harness at one or two points. It appears that you are missing that part.