After a hard night at a mud bog, bouncing crap around in the cab etc, I noticed that my amp and 2 12" subs "whine" with the RPMs of the motor when I have the volume turned down..

This didn't happen before..

I have the amp hooked to the drivers side battery... Any ideas for me?

 

From what I remember from my sterio days. It usually has to do with the ground.

 

Check you amp & stereo grounds... Also check the truck grounds too...

 

HEY you may be on to something, all i hear is how these guys wanna "hear" their engine and boost more.....

 

It's a grounding issue for sure. Try to find a body/frame ground near the back of the truck.

 

Or the alternator has a leaky diode. Getting wet can do that. I recently changed my alternator for that exact reason.

 

Are you running the stereo wires too close to the spark plug wires.

 

I had the same problem for a while, changed the ground, and it went away.

 

nah sidewinder ... back in the day when ford owned cummins they ran the ground wires too close to the sparkplug wires.....

 

I think the two of you are both a quart low on blinker fluid...

You might order up some muffler bearings too...

 

Dont forget the hubcap gaskets. you dont want those leaking.