This isn't my first time working with car audio, so I feel like I somewhat know what I'm doing. My friend wanted to do it the cheap way without a wiring adapter so I spliced the stock speaker wires to the head unit. I checked with a multimeter that there is power going through the wires, but it doesn't make it to the speakers. I did some troubleshooting and when I hook a speaker straight to the wires coming out of the head unit, it plays perfectly. It's almost like something is wrong with the stock speaker wires, but that also doesn't add up because everything worked perfectly the day before on the stock head unit. Thanks.