RF speaker works intermittently...

[Rezz]

The previous owner put in some Sony speakers in the front doors that are in great shape. I tested and inspected them so I know that they are not the cause. All connections inside the door appear solid. So my question is... Could the speaker be going out due to a failed internal component with the factory head unit? Not sure if this is a common problem. If not, maybe a ground wire that tends to fail? One last bit, it comes on USUALLY if I crank up the volume or hit a hard bump. Makes me think the circuit it open somewhere if not a failed component.

P.S. - I am very proficient with soldering and circuitry engineering but of course, it works whenever I try to test it and I have not yet felt like opening up the head unit yet.

[evil_demon_01]

I tested and inspected them so I know that they are not the cause. One last bit, it comes on USUALLY if I crank up the volume or hit a hard bump.

Sounds like a faulty speaker coil.
How did you inspect them?

Really simple way to test - Swap the speakers.
If it still happens on the opposite door - The speaker is at fault.
If it still happens on the same door - The wiring/headunit is at fault.

[sonikaccord]

Broken solder joint in the hu?

If you tested them properly, you would definitely be able to tell if your speaker was cooked.
I don't think your speaker is grounded...

To test the hu just tap it with a rubber mallet on the chassis. It will simulate going over hard bumps.

[Xclusive1]

Yup. Looks like your best bet is to swap your speakers and see if the problem has moved to the other side.

[Rezz]

I tested them by swapping them side to side (like someone mentioned). The fault was still on the right side. The ever perplexing part that I forgot to mention is that IF the speaker is NOT working and I turn the volume all the way down, it remains the only speaker that BARELY remains audible... I would think a bad ground would be ruled out by that but could be mistaken.