westaaronm83 Posted February 20, 2015 Share Posted February 20, 2015 While replacing the heater core I noticed that the black vacuum line going into heater box was broke. I assume that this is the reason my defrost to vent selection wouldn't work. While installing everything back I broke a multi colored vacuum harness in the engine bay next to the firewall/heater inlet. Now when engaging the 4x4 the front differential won't actuate. I know it's because of the vacuum but my question is where can I find a new harness? Also is there a quick home fix method or a way to rewire the vacuum system? I have found no replacement except for this http://4x4posi-lok.com/app_jeep.html. This part is hard lined in so the vacuum wouldn't need to be fixed though I rather fix it the right way. Link to comment Share on other sites More sharing options...
gogmorgo Posted February 20, 2015 Share Posted February 20, 2015 Plug the lines and permanently lock that CAD. http://www.comancheclub.com/topic/17377-cad-fix-1/# Link to comment Share on other sites More sharing options...
Bounty Hunter Posted February 20, 2015 Share Posted February 20, 2015 You can remove the 4 bolts and remove the vacuum disconnect from the front axle. Engage the shift collar to lock the two axleshafts together. Install the vacuum disconnect upside down and it will hold the shift collar in the locked position. Done. Link to comment Share on other sites More sharing options...
westaaronm83 Posted February 20, 2015 Author Share Posted February 20, 2015 I appreciate the help I am warming up the garage now to get ready to lock the CAD in place. I found a diagram of the CAD system here on the forums and it turns out that all the lines that broke went to the actuator. Link to comment Share on other sites More sharing options...
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