Interference from brake lights, signals, and rear defroster, Please Help!


tommy234

Junior Member
Dec 16, 2016
9
0
Ontario
After installing a 4 Channel amp I'm getting a humming through all speakers.

It happens when I press the brake pedal or have my signal on and is much louder when I'm doing both at the same time. I also get a pop when turning on the rear defroster.

It gets louder the higher I set my gains.

I installed a noise filter which did absolutely nothing.

I am wondering what steps can be taken to try and narrow down what is causing this problem.

Any advice would be greatly appreciated

 

viwil

Junior Member
Mar 9, 2017
4
0
Montana
Have you checked the grounds? Maybe adding an additional ground wire from the Battery to the frame of the car? Or regrounding the Amp grinding the ground point to bare metal.

 
OP
T

tommy234

Junior Member
Dec 16, 2016
9
0
Ontario
I was thinking of doing a big three upgrade when it gets a little warmer out. Also checking the ground on the HU. Ya I figured the filter wouldn't work either but it was worth a shot

 
OP
T

tommy234

Junior Member
Dec 16, 2016
9
0
Ontario
another thing i forgot to mention...if the engine is not running and just on accessory power there is no interference

 

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