Factory harness was cut out and I'm attempting to install aftermarket head unit. I've looked at some online but they don't seem right because they say the 12v constant is Yellow but I don't have a yellow wire in the dash. Also it says orange is the switched but I have two oranges. Just would like someone ms advice that also had to hardwire, or is there an easier way to do what it sounds like I'm trying to do? Thanks all