I just installed an aftermarket 4-channel amp and new speakers in the car. The steering wheel controls are no longer working. I ran speaker wires back to the trunk and tapped them into the harness at the head unit (stock HU). This was all connected and temporarily spliced in the trunk until the amp was put in. Had speaker level inputs, and then back out to the speakers (through the stock harness.) All this was wired at the head unit and they worked fine. Put the amp in and now they don't work. Any ideas please? I've checked all connections and everything appears fine. What color wires from the stock harness for the controls? No low level pulses are sent though the audio circuits right? Please help.
EDIT: I think I realized what happened. The brown/yellow wire (which I believe is the control wire for the steering wheel controls) accidentally came into contact with voltage and shorted. Is there any type of internal fuse or component such as a resistor or something that may have blown and could be replaced?
EDIT: I think I realized what happened. The brown/yellow wire (which I believe is the control wire for the steering wheel controls) accidentally came into contact with voltage and shorted. Is there any type of internal fuse or component such as a resistor or something that may have blown and could be replaced?