TJ/LJ owners: Need Help

[UNSTUCK]

Hey guys, just need a little help. I’m trying to verify my A/C signal is working properly for my LS swap. In my 2006 LJ, the A/C request signal to the Jeep ECM operates on the ground side. My new A/C controller wants a positive signal. I’ve got that figured out, but what I discovered is that I get that signal with the switch on the three A/C settings, and either of the defrost settings. The signal goes away with the switch set to non A/C dash vents and the floor only setting.



If you have a functioning A/C system, can you look at it and see if it operates the same way? Just look at your compressor and see if it’s running as you cycle through the different settings. I didn’t think to adjust the temperature setting to see if that mattered. I don’t think it does but can you check that as well? Check everything on the coldest setting and then again on the hottest setting.

Thanks.

 

[OldGeezer]

Sounds right. In the owners manual it says that the a/c also comes on with the defrosters to help get rid of the humidity. I haven't popped the hood to verify.

 

[UNSTUCK]

Thanks for that. Sounds like I’m headed in the right direction.

 

[TurboMinivan]

Sounds like I’m headed in the right direction.

Indeed you are. The operation your described in your original post is precisely how the system is designed to function.

 

[UNSTUCK]

Perfect. Thanks.