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1991 BMW 325i

Question: weird sound through speakers when radio is turned on.

Question

girlgeek2, San Francisco, CA, November 25, 2011, 10:47
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Hi, this only happens when the radio is on (ofcourse). Any action which utilizes current, such as stepping on the break which means the break light turns on, using a turn signal,turning on wipers gives me an audible "poof" like sound to eminate from the rear speakers. Clearly it must be the sound system (it is the original one) but I don't know where to start. Has anyone experienced this before and do you have any suggestions on where to start. I don't want to install a new radio since, once it's on, there is no problem with the sound...
Thanks in advance!

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  • Answer #1

    Hal... (see my shops), November 25, 2011, 11:24
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    Check for RF interference. Any new bulbs been replaced recently? It's not the radio but the wiring having poor insulation somewhere. Check the basics...

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    girlgeek2, November 26, 2011, 07:05
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    Thanks for the response. No, no bulbs have been replaced and are all functioning fine. I am sorry I didn't indicate that I am a novice at anything automotive, however, I am an experienced computer hardware troubleshooter. Your answer makes absolute sense, but I am not sure where to start checking the wiring. In the back from inside the trunk or under the dash? Thanks for your help!!

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    Hal..., November 26, 2011, 17:56
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    It's probably back under the accessory tray where you hear the noises from those speakers

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