FRS Audio System Not Turning On
 

So I picked my car up from the shop after they installed the Airlift system and I realized the headunit won't turn on and I am sure its from the electrical system wiring with the airlift. I checked the audio fuse and it is good. What else can I check before I call them tomorrow? I didn't get a chance to call them as I picked it up just before they left.

Honestly, I'd just wait to call them tomorrow. One day without music will be fine. Just keep it floored the whole time!