I used EZ Wire and it came with instructions and marked wires. Plus they answered the phone and have a very good tech. I would start at KIC. If you paid anything close to their list price on line, I'd be burning their phone up.
Welcome, BTW.
It stands for "Keep it Clean". I did some research on it and it got some good feedback. It's a whole vehicle harness for about $150. You just have to pin all the wiring, which is not a big deal. Takes more time to put in, but you save about $900 from the plug and play setups.
