Sound system gone to pot

[Welshy_Pete]

I was driving in my other car today and then a loud screach noise coming from the speakers stereo. I had to turn the engine of then take the stereo out of the car to stop it.

So I left it afew hours then tried plugging the system stereo all back in. Now when the first igintion key turn the stereo all comes on fine but with a humming on the music playing. If I turn the key to the dash lights showing up a loud noise sounds.

The 4 Blaupunkt speakers all work and the 2 Blaupunkt amps as well. The base speaker working as well Ive tested these to make sure.

When the car was driving you could hear a whining noise as well.

Rca all separate from the power and remote.

Remote separate from everything.

Power cables just togeather still hmm. But would them both being togeather cause a problem?

Taken stereo out the car and still hmmmm.

Tested 5 amplifiers still hmm.

Taken both earths of the amps then put them back on still hmm.

There nothing wrong with the amplifiers and stereo.

I cant leave the amplifers in the car anymore it just hmm all the time.

This ant normal thats for sure Ive done alot of tests it just doesn't make sense.

[MarkTD]

Have you got a good earth connection?

The power cables could be causing the noise, it's worth moving them away from each other.

Have you tried another headunit?

[raymond76]

disconnect the battery leave for half hour and re connect, i had this on a old xsi once that worked for me ...try it

[Welshy_Pete]

Have you got a good earth connection?

The power cables could be causing the noise, it's worth moving them away from each other.

Have you tried another headunit?

The earths are good yes the system been working fine over 1 year. Im using to earths for both amps.

It makes the noise with out the headunit plugged in so I eliminated that.

[Welshy_Pete]

disconnect the battery leave for half hour and re connect, i had this on a old xsi once that worked for me ...try it

What caused that it was strange?

[raymond76]

to this day i dont know but it was doing my head in i tried everything , disconecting the battery was the last thing i did but it worked, did it work? must be interferance from one of the power wires, old cars used to do it, and you need to fit a suppressor or somthing like that to the altornator, but thats just a guess

[Welshy_Pete]

My sound system hasn't been working since March. But today I took the amplifiers out and sub. I wired all 4 speakers to the standard headunit speaker wires all working fine. Also the 4x50rms is the same as the 4 speakers 50rms each. So the headunit powers the speakers great.

There also a built in extra amplifer just for the sub only. But is there away to run it without a amp somehow like the car speakers?

Im thinking if I put the sub back in with 1 amplifier now I wander if it might work or not properly....

[stevieg]

if the noise is still there with no stereo connected its to do with the rca leads or amp, if it still does it with no rca leads in the amp then your problem is to do with the amp