Question about 2005 Audi A4

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Radio has very weak signal on AM & FM , Audi A4 2005. Other cars we have get a strong signal, ( Lexus )

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More than likely you have a poor antenna ground, the outer woven part of the antenna coaxial cable is grounded to the chassis sheet metal of the car, this may be making a poor connection or the antenna may be defective. To check the antenna ground jacket find the antenna cable under the the dash, make a small hole in plastic covering on the woven outer metal conductor with an electrical probe attached to a DVOM (Digital Volt Ohm Meter) set to the 200 Ohm scale and touch the cable and any bare metal in the car, you should have no more than 3 Ohms of resistance, if you do you either have a poorly grounded antenna or a defective antenna.

Posted on Mar 24, 2011

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This can be traced to a couple of things, first check all the connections between the antenna and the radio for corrosion and tightness. This could also be related to the relative design of the antenna. The Lexus could have a better design, or location, and this could be why you receive better on its radio.

Posted on Mar 24, 2011


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