focus phone installation problem

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Sat 17 Apr 2004 22:48
focus phone installation problem - vin
I have just fitted a nokia car kit [3410] into my 2000my focus. The kit is working correctly except, when I dail in a number with the radio on I can hear feedback through the stereo speakers.
Once the call is connected the radio mutes, the feedback stops and the call is fine, I end the call and the radio comes back on.

The car kit has a seperate speaker - Has anyone any ideas why this is happening?? The wiring for the car kit is simply red permenant live, blue ignition live, black earth, yellow mute taken from back of radio. The fault occurs whenever the radio is switched on (either tuner or CD).

Thanks
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Sat 17 Apr 2004 23:07
focus phone installation problem - Civic8
Radio is picking up the transmission.speakers will as well if phone is close to them.there may be a way out but I dont know of one.I would be interested to hear of any way to prevent it.?
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Sun 18 Apr 2004 11:01
focus phone installation problem - Peter D
Take the phone out of the holder but only by a cm or so and dial a number with the radio on. I suspect you will here the same interference. The is the radio picking up the mobile transmission due to proximity of the phone to the radio. You may also hear the interrogator every 10 to 12 minutes. This is due to the phone being requested to TX at full power so the network can ensure you are communicating with the most appropriate mask. Regards Peter
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Sun 18 Apr 2004 14:03
focus phone installation problem - Altea Ego
If this is a pulsing buzzing kind of sound (and as said happens every 7 - 10 minutes) this is indeed the RF energy being transmitted to the radio. Its probably going in on the "mute" line. Toddle down to your car audio shop and get an "in line choke" sometimes called an "rf suppresor" and put this in the mute line
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