super easy. just know they arent exact on wiring color, but its easy enough to figure out. im not sure if theyve updated the steps for the 2008-10 , but on my 13' , i had to have all 4 door wires tapped to test the doors. took me a half hour or so of frustration to figure that out. so if the initial door you hook up and test doesnt work, hook all up and test from there. i would start with the easiest wire to find. prolly a solid white. you shouldnt need a tester, but you may want one just in case you're harness is a mess. iirc one of the door wires is in a loom up in the kick panel, you'll wanna cut the electrical tape to loosen that loom up, if not its a bitch to find.