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Brown wire in front windshield?


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So I have a question. My windshield has a brown wire in the front of the windshield. that is connected to a wire coming out of my dashboard. Any Idea what it is? I have attracted a picture. Thanks so much.IMG_0036.jpg

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Antenna, some Nissan radios (as well as Sony) have a dual diversity tuning system, where the radio decides which antenna has the best signal either the fender mounted one or the one in the windshield.

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Windshield one is FM, fender is for AM according to the FSM.

The FSM has a few typos in it, and looks like we have found another.

 

If memory serves correct;

 

AM radio is a wave typically taken in best by angular or angular coiled antennas (the L on you windshield or that square your home stereo came with that the antenna wraps around, will also receive FM esp if it has a straight segment leading to the unit)

FM radio is traditionally a straight mast usually in multiples of 6" because of how the physical size of FM wavelength and how they can be divided / received. (IRC its 36" so 18" is a half wave and 6" is a quarter wave)

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