[Engine whine out of one channel of Rockford Fosgate 551x]

Got it figured out I hope. Cleaned up the ground area with a wire wheel so it's basically polished metal, re-did the ground to my 501 and added a capacitor. Seems to have solved the problem for now, thanks everyone!

[Engine whine out of one channel of Rockford Fosgate 551x]

Well it wasn't an intentional ground I just unplugged the remote wire to see if it was the amp or something else and it touched the case ( it's super close to the edge of the casing kinda a flawed design if you ask me). And it only does it when the truck is on

[Engine whine out of one channel of Rockford Fosgate 551x]

I'm getting a extremely annoying engine whine out of my tweeter on my front left channel. Only does it on that particular channel. I have two amps a 501BD and the 551x running off my Jensen UV10 head unit that share a remote wire, I found that when I take the remote wire out of the 501bd for my subs and touch it to the case of the 501 then all my speakers stop playing music and the whine stops for about 10-15 seconds the starts up again same thing happens if I take the remote wire and do it on the 551x. When the deck is off it doesn't whine so that eliminates the possibility of the speaker wires ground info out somewhere. I'm going to try switching the Rca to see if it follows to the other side and I'm going to clean up the ground to both the amps and see if that helps. Other than that and the possibility of the amp being bad or the head unit ground I'm out of ideas on what it could be. Thanks in advance!