Hey Guys. I was helping a buddy of mine install an alpine head unit in his truck, and now we are having a strange issue. The screen works, but none of the other LED lighting for the radio controls are working. I am wondering if you guys might have an idea of what might be causing this. My mind will not be at ease until I find out what's going on :/
The story is my buddy has an alpine head unit installed in his old truck. One day somebody broke into his truck and stole the removable faceplate off his head unit. He then went out and bought the same head unit again so he can pull the faceplate from it and install it in the stereo he already had.
Fast forward to last weekend, and me and my buddy are installing the 2nd head unit he had in his new truck. His plan was to swap the faceplate back and fourth from vehicle to vehicle, to whichever one he was driving.
We wire everything up, hook up the head unit and test it out. After a little trial and error, the deck was working perfectly, no issues at all. It wasn't until we just finished putting everything back together when this issue popped up. Everything in the head unit works fine: the screen works and all the controls work, but the led lights behind all the controls are dead. Playing with the dimmer settings on the head unit doesn't do a thing.
Needless to say we are a little bummed about this.
We did try switching the faceplate to the head unit in his old truck. It works perfectly in there.
Any ideas what can be going on? Is it possible that something is screwed up in the wiring that we can fix, or did we fry the head unit?