Help think I may have F***ed my head unit!!
So I was installing my new amp and distribution block tonight and everything went fine. Did a final test before bolting everything down to make sure everything was good (and it was). After bolting everything down I turn the car on again and all of a sudden have HORRENDOUS ECM noise with the car "off" and even worse noise with the car "on".
Turns out when I was bolting down I accidentally clipped one of the speaker wires slightly with a screw and I got a bad feeling it may have shorted out something in the head unit, like a PICO fuse or something. The noise happens whether I use the front or rear RCA cables, but the noise does not effect the subs.
And I know it's not just a bad ground because everthing was fine before I nicked the speaker wire.
Also I don't think it's the amp that got fried because I tried another amp and had the same problem , in fact the problem was even worse on the other amp, where that amp had no noise issues at all the last time it was installed 2 weeks ago.
My head unit is a Kenwood DDX419, so if anyone knows what exactly has happened here and can let me know if this is fixable or if the unit is toast now or what?
Vehicle: 2007 Pontiac G6 GT
Head Unit: Kenwood DDX419
Speakers: Focal PS165 Components
Distribution: Knukonceptz KNF-60 Power/Ground Distribution block
Amps: Audioque 200.2, Rockford Fosgate T2500-1BDCP
Subs: 2 SA-8v2 D2 wired @2ohms in custom ported box tuned to 34-35hz
Wiring: All 1/0 Gauge SHOK Wire and Knukonceptz wire + BIG 3
Alternator: Singer 310A 6 Phase High Output Alternator