Converted CJ2 automatic climate to CJ3 manual controls

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j91z28d1

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I don't know on these trucks. but on a c6 it can make setup changes, like if you have active suspension or not. some guys have added and used the tech 2 to go into setup and configure the options.

maybe something like that?
 
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mikez71

mikez71

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Couldn't find any special functions on the Tech2 other than afterblow and recalibration and some temp display option which doesn't work and says I selected the wrong vehicle.

I notice the automatic HVAC can either be BEHR *or* DELPHI, the actuators are outiside of box on the BEHR, inside of box for DELPHI. The manual HVAC has *only!* DELPHI, mine were/are BEHR. The actuators are located on the OPPOSITE side! If you do not have the actuators located on the inside, you may need a donor rear box..

BUT I wonder if the '08 wiring manual showing the var/src and ref/rtn circuits flipped would work??. They may have been planning for a behr manual setup, but actual production omitted behr..
 
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j91z28d1

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I can look up the 08 manual hvac if you want to look.

I hope it didn't fry anything, but if there's a pwm output or 5v output that got 12v put into it. that would toast a fett ******.
 
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mikez71

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Yep, those wires weren't really changed, shouldn't have fried anything near as I can tell!?

Ordered a couple actuators and will check the actuator wiring when puttin them in..

---UPDATE---

removed ducts to watch actuator doors.
doing recalibration, everything moved smoothly, full range of motion.

watching tech2 info, when changing rear mode, actual was inverted from commanded.
Example 0 commanded would be 255 actual, 255 commanded was 0 actual position.

Hoping this is as simple as swapping polarity on a couple wires. I have old actuators out to do some testing.
I really wonder if this has to do with the wiring diagram difference between Behr/Delphi in the '08 factory diagrams.
 
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j91z28d1

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so looking at the modules in my car today on the sps software. I did see some how the option to program or configure/setup. I don't remember exactly the wording. I will have it in my yukon in a few days or so. I'll try too check what options it gives.
 

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