I have a 2015 Sierra Yukon 1500. I already bought the original magnaride shocks for the front. Started the job only to find out previous owner replaced the magnarides with a bypass kit AND cut off the car side connector. I have 2 questions….can I use the new magnarides without connecting the harness? Second, are the two wires on the car side signal/control wires or 12 volt, or one of each? I get no voltage reading on either wire with car running.