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Old 01-15-2003, 01:46   #1 (permalink)
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Crackling in speakers when pressing brake pedal?

Gday guys.

I am getting a crackling noise coming through the rear speakers when pressing on the brake pedal. I have just recently replaced the brake switch but I am not sure what is causing the interference?

Can anyone point me in the right direction to what to look for?

Thanks,
Glenn
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Old 01-15-2003, 11:16   #2 (permalink)
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Check your earth wires.
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Old 01-16-2003, 02:42   #3 (permalink)
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Read Speakers

Mate,

Im assuming this wasnt happening b4 you replaced the brake switch??

Are the speakers new/just been installed?

You could also possibly be getting crackling/cut outs if any part of a speakers terminal are touching metal bodywork of your car as well.

If this is not the case...just double check the connector on your brake switch, as TopGhia said, earth problem probably.

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Old 01-16-2003, 02:49   #4 (permalink)
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The speakers have been in the car for ages but the only thing I could think of that I have done recently (cupla months ago) is changed the brake switch.

Have just started noticing the crackling in the last week or two. Thanks for the suggestions, will have a look at it tommorow.
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Old 01-17-2003, 23:21   #5 (permalink)
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Had this problem last trip away.
The metal strap on a suitcase in the boot was touching the speaker terminals and shorting them to earth.
Only Crackled when I applied the brakes, causing the bag to move forward and put pressure on the terminals.

Remember the speakers have big magnets which will attract any metal object within a few inches. I have insulated my terminals to prevent further probs.
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Old 01-18-2003, 15:39   #6 (permalink)
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Also, make sure the wires and speakers are nice and solid, and not moving at all, coz when u brake the centre of gravity moves... and, well you get the idea. As xlr8ing said, insulate the terminals, but also, try removing the speakers, and putting a thin layer of plsatic betten them and the car.. ive heard of that helping


Regards,

chris
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Old 01-18-2003, 21:28   #7 (permalink)
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Ok well I have just checked the wiring connections at the speaker, the connections to the amp they run off and the connections of the amp wiring to the deck up front. Can't see any problems with metal touching or bad connections.

Also checked the wiring around the brake switch and played around a bit with them while pressing the brake pedal with no luck.

The problem is not caused by movement of the car because while I was testing it the car was parked and i was simply touching the brake pedal on and off with my hand and the crackling still comes through.

Could it be caused by some of the wiring running through the car being crimped or squashed between metal or something like that?

When you say insulating the connections do u just mean wrapping them with insulation tape or something like that?
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Old 01-18-2003, 22:13   #8 (permalink)
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Sounds like interference....try pressing the brake pedal with the brake light bulbs out if you can.

Is your chassis earth ok?

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