Pulled up the spare tire and compressor to inspect the EHC module last night. As soon as I touched it the compressor kicked in.
Looks like I have a intermittent connection issue to my EHC module. Not sure why. I do have an extra piece of hardware next to the battery I installed called a battery brain that allows you to remotely disconnect the battery. I think it was pressing on the module with the weight of the plastic cover and compressor on it. I'm going to relocate it to where the tool kit pouch is that sits in the little triangle thing next to the spare tire.
Connecting fine now in INPA/DIS:
