Extremely Loud Popping

[crazyone 10+ year member]

My Components (powered by an amp) started making a very loud popping noise only when the electirc passenger side window was being lowered or raised.

Everything was working fine for a couple months. This happened out of the blue.

Any ideas before I start disassembling ?

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[Techchild 10+ year member]

Something might be wrong with the passenger side speaker wire causing it to short out when the window touches and moves it. It could be rubbing the inner door panel and sheared off the wire cover.

 

[crazyone 10+ year member]

I wasnt able to detect anything wrong with the speaker wire or any of the soldered points.

Could this popping be related to the RCAs interfering with something ?

I have the power wires on the left side of the car, and 3 sets of rcas on the right side.

 

[azimuth 5,000+ posts]

where is the ground for the amp at?

 

[dumpin907 10+ year member]

i had the same problem bro. it turned out to be my HU. try hooking up a different HU and see if the problem persits

it was my HU's RCA inputs that were all fvcked up

try disconnecting the rcas from your HU and pluggin them into your freinds HU and see if it stops.

 

[crazyone 10+ year member]

I will check the HU rca's.

Thanks for the info,

The ground for the amp is in the trunk, it is a good connection.

Forgot to mention, it resembles 1000 beats per minute, to give a better idea.

 

[crazyone 10+ year member]

More info

With the white RCA connected, music plays fine out of the left side of the car.

With the RED RCA connected, it produces that popping sound.

I tried different RCAs

It is doing it whenever the deck is turned on now. Not just when the window is being lowered/raised

Any other ideas?

 

[_DjScrew_ 5,000+ posts]

More info
With the white RCA connected, music plays fine out of the left side of the car.

With the RED RCA connected, it produces that popping sound.

I tried different RCAs

Any other ideas?

did you try the other hu yet? it's either the output on the HU or the input on the amp..

 

[crazyone 10+ year member]

I havent hooked up another deck to test that out.

I am going to try grounding the RCAs tonight, if that fails, i'll ripp out the RCAs and hook em up to another deck,

 

[crazyone 10+ year member]

Hooked up another deck RCA to my amp rca

The popping was not there.

 

[ultimate157 5,000+ posts]

bad HU

 

[crazyone 10+ year member]

After more testing, It is only doing it when the passenger window is being lowered/raised, contrary to what I said before.

It is drawing extra power to move the window, and somehow making the speakers pop.

I dont understand how but I will try a new ground point for the amp and for the cd deck to see if that makes any difference.

 

[ultimate157 5,000+ posts]

Do this: Unplug the RCA's from the amp, turn on the system, and test.

If the noise goes away, the noise is being generated in the HU / RCA's. If the noise is still there, problem is in your amp.

 

[crazyone 10+ year member]

With the RCA unplugged from the amp, and still plugged into the HU, there is no noise.

So knowing the noise is being generated in the HU / RCA's

What can I try next?

 

[ultimate157 5,000+ posts]

Plug the RCA's back into the amp, and unplug them from the HU. If the noise reappears, then the RCA's are receiving interference.

Still no noise, then the next step is to redo the ground on the head unit.