Hi to everyone! Recently bought an ‘05 Titan & new to the forum and already found a ton of useful info on here so I’m confident someone on here can help me out. My truck had no head unit & previous owner removed all aftermarket components & left factory Clarion speakers in doors & wires to amp(s). Mine is extended cab w/factory amp under the dash. I bought a factory 6 disc head unit & plugged it up but have no sound from speakers. I reconnected all the speaker wires that I found to have been cut & spliced but still have no sound. My question is do the head units have different wiring? All the plugs plugged in but there is one plug closer to the climate control that is not plugged into anything. Is this for the amp? Any help will be very appreciated as I’ve been working on this issue for several days now. I do not know if power is getting to the amp. I’ve checked all fuses but still have no sound. Everything lights up on the HU & seems to be in proper functioning order.