The old stereo, when turned on to radio, would make the power antenna go up. After installing a new Sony headunit, I cannot seem to find a trigger wire not sure if there should be or not and cannot get the antenna to power up. I have plugged in the coaxial cord and can get a very grainy FM signal with the antenna not going up.
The instructions of the new power aerial will explain how to wire up the unit
some are wire for wire and others some wires are used and others the wires are different
talk with a radio installer for suggestions of the wiring
Sorry for the confusion. I am wiring my new headunit to the old (stock) power antenna
select a wire that has power on it that goes to the antenna when the radio is switched on and work from there
you only need one power wire and possible an ground wire or the antenna may ground back through the outer case of the coaxial cable , through the radio case to ground
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