cant find good info on how it operates , good voltage on the center wire red and no change(ground) on other two when changing from hot to cold on both drivers and pass sides . cant decide if the heater control valve or control is my problem. car came in with an a/c problem no cool air another shop replaced compresor and way over charged system evac and recharge now we have great condensation but 100+ deg drivers side and 85ish pass .
temps go much cooler when pinch off heater hoses

 

Keep reading - the info's on here.

But from those values looks like the control module's not working - or bad fuse/relay.

 

sorry just learning how this site works . 00 S-type 3.0 liter with 113000 miles, the voltage reading i took were with control valve disconnected. realy not sure how valve is controled , is it supplied voltage or ground and is the control module part of the control head in the dash????????

 

It's well described in previous posts (which is why the FAQs and Search exist) but basically the module changes the voltage on each of the outer pins of the valve (which of course needs to be connected) as you change the heat settings for L & R. If the voltages don't change then either the module is faulty (most likely) or an input to it makes it think it doesn't need to change the output.

 

located problems; found three, 1st a/c way over charged(2.76) evac recharge to 1.75lb,2nd one side of heater control valve is failing and the other is bad,3rd found a burnt spot on the ccm board prob. from shorted valve , customer also stated that they have had battery problems (parasitic drain)parts needed for repair ,climate control module, coolant control valve, and fluids

 

You do know the CCM is repairable and much cheaper than new??

The current drain could be one of several things. First fix what you have found then check for voltage drain. Possible REM (Rear Electronics Module).
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Whats the vcats # for the ccm(climate control module) i have 1. Its on a label in the trunk in the spare tire well...
lists all the control modules and their suffixs. lik 001, 003, 005 etc

 

yea i know its repairable just dont know where .vcats # ccm/18c612/ak/001 is this unit plug and play or does it need programing , jag tells me its a 50 -50 chance. they just dont want to give any good info.

 

it is a 001 suffix, this is what you need for a direct replacement. A new 1 will work, but theyre programmed for right hand drive from the uk, so it will have to be programmed or configured to us standards. Or they can live with it working opposite. The passenger temp controls are the primary control and the drivers side are secondary. To go to max cold or hot you will have to operate the temp controls on the passenger side of the faceplate. Or you can repair the circuit board like discussed already since you see where the open burned circuit is at. And replace the heater control valve

 

thanks to all that replied u have been a big help, still have one ? where can i have the ccm repaired , local jag wants 900 for it and tring to complete job in the shortist amount of time and for cost that is affordable

 

Anybody that can solder a circuit board if your not comfortable doing it. Call around till you find someone that repairs boards