E5Farmer Posted January 14, 2022 Share Posted January 14, 2022 New to me 2012 CXU613. MP7. Both my cab temp and mode(vent/defrost) controls are not working. Fan control works as it should. Just always blows HOT air from the vents. I was told actuators buried in passenger side dash. But the temp actuator has been on back order for months. I raise an eyebrow when BOTH of them are not working. I checked fuses on top of the dash and fuses underneath by brake pedal. (Don’t have fuse diagram, checked all of them). All are good. It looks like their is a harness going to fan control and one opposite for mode/temp control? If I turn key to on position I cannot get any constant power from any of the terminals out of the wiring harness. Go ahead and replace all the actuators like was suggested? Or can you think of something else? Any thoughts are appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/69063-cxu-temp-and-mode-controls/ Share on other sites More sharing options...
E5Farmer Posted January 15, 2022 Author Share Posted January 15, 2022 I am wondering if power only comes in on the fan control side? Maybe it is my controller that is bad? I cannot seem to find a wiring diagram on this thing. Mack seems to keep things locked down tight. (First Mack truck for me) Quote Link to comment https://www.bigmacktrucks.com/topic/69063-cxu-temp-and-mode-controls/#findComment-487095 Share on other sites More sharing options...
Mackpro Posted January 15, 2022 Share Posted January 15, 2022 Here is a link to the factory manual for several different HVAC models, make sure you use the correct model . https://s6dc2dc82dd3d959c.jimcontent.com/download/version/1549531542/module/8252074015/name/Air Conditioning System Service Manual. Includes US 07 Mack Chassis%2C GU (Granite Series)%2C CHU AND CXU (Pinnacle Series)%2C MRU AND LEU (Terra Pro Series).pdf 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69063-cxu-temp-and-mode-controls/#findComment-487106 Share on other sites More sharing options...
E5Farmer Posted January 16, 2022 Author Share Posted January 16, 2022 22 hours ago, Mackpro said: Here is a link to the factory manual for several different HVAC models, make sure you use the correct model . https://s6dc2dc82dd3d959c.jimcontent.com/download/version/1549531542/module/8252074015/name/Air Conditioning System Service Manual. Includes US 07 Mack Chassis%2C GU (Granite Series)%2C CHU AND CXU (Pinnacle Series)%2C MRU AND LEU (Terra Pro Series).pdf Thank you. That looks like good information Quote Link to comment https://www.bigmacktrucks.com/topic/69063-cxu-temp-and-mode-controls/#findComment-487189 Share on other sites More sharing options...
E5Farmer Posted January 16, 2022 Author Share Posted January 16, 2022 23 hours ago, Mackpro said: Here is a link to the factory manual for several different HVAC models, make sure you use the correct model . https://s6dc2dc82dd3d959c.jimcontent.com/download/version/1549531542/module/8252074015/name/Air Conditioning System Service Manual. Includes US 07 Mack Chassis%2C GU (Granite Series)%2C CHU AND CXU (Pinnacle Series)%2C MRU AND LEU (Terra Pro Series).pdf Where do you find online manuals like this? Quote Link to comment https://www.bigmacktrucks.com/topic/69063-cxu-temp-and-mode-controls/#findComment-487190 Share on other sites More sharing options...
Mackpro Posted January 17, 2022 Share Posted January 17, 2022 (edited) I bought lots and lots of the Factory manuals over the years when I was at the dealership. Most were $8-$15 a piece. I have this one in print so I knew what it looked like and just did a quick search and it turned up. The Mack E-Media site is free but I think it’s mostly Service Bulletins now, it used to be full of manuals. Also the Mack Body Builder website has lots of free maintenance info that’s way easier to navigate than the dealership website. In related info RH Sheppard and TRW both have all their steering gear manuals free online. Eaton Fuller has all their transmission manuals online as well . Bendix also has lots of free manuals on ABS/brakes. Edited January 17, 2022 by Mackpro Quote Link to comment https://www.bigmacktrucks.com/topic/69063-cxu-temp-and-mode-controls/#findComment-487219 Share on other sites More sharing options...
Joey Mack Posted January 17, 2022 Share Posted January 17, 2022 here are the fuse legend's... A little hard to read, my hands were dirty when i made these copies in a hurry... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/69063-cxu-temp-and-mode-controls/#findComment-487248 Share on other sites More sharing options...
E5Farmer Posted January 17, 2022 Author Share Posted January 17, 2022 12 hours ago, Mackpro said: I bought lots and lots of the Factory manuals over the years when I was at the dealership. Most were $8-$15 a piece. I have this one in print so I knew what it looked like and just did a quick search and it turned up. The Mack E-Media site is free but I think it’s mostly Service Bulletins now, it used to be full of manuals. Also the Mack Body Builder website has lots of free maintenance info that’s way easier to navigate than the dealership website. In related info RH Sheppard and TRW both have all their steering gear manuals free online. Eaton Fuller has all their transmission manuals online as well . Bendix also has lots of free manuals on ABS/brakes. Thank you for the information 12 hours ago, Mackpro said: I bought lots and lots of the Factory manuals over the years when I was at the dealership. Most were $8-$15 a piece. I have this one in print so I knew what it looked like and just did a quick search and it turned up. The Mack E-Media site is free but I think it’s mostly Service Bulletins now, it used to be full of manuals. Also the Mack Body Builder website has lots of free maintenance info that’s way easier to navigate than the dealership website. In related info RH Sheppard and TRW both have all their steering gear manuals free online. Eaton Fuller has all their transmission manuals online as well . Bendix also has lots of free manuals on ABS/brakes. 8 hours ago, Joey Mack said: here are the fuse legend's... A little hard to read, my hands were dirty when i made these copies in a hurry... jojo I saved all of these. Thank you very much! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69063-cxu-temp-and-mode-controls/#findComment-487257 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.