mrjoeyjiffy Posted October 13, 2009 Report Share Posted October 13, 2009 Hello all, I recently installed an avic d3 in my tahoe and I have the strangest problem. My headunit itself(not the speakers) has what sounds like alternator whine coming out of it, although it comes out even when the engine is not on, however when the engine is on it certainly goes with my rpms. I've tried eliminating every variable there is, trying a million different ground spots, including going straight to the battery for power and ground with the same results. The only thing that eliminates it is by turning the screen off, not the entire head unit but just turning the screen off in the options menu and this whole problem goes away, is there anyone out there that knows how to fix this? Im banging my head up against a wall trying to figure it out. Quote Link to post Share on other sites
bikerider Posted October 17, 2009 Report Share Posted October 17, 2009 The D3's cooling fan is fairly noisy, that may be the whine that you are hearing. Quote Link to post Share on other sites
1loudls Posted October 29, 2009 Report Share Posted October 29, 2009 as i was reading this i was thinking that the fan might be the cause but not if the sound goes away when the screen goes off, this points to somthing in the screen, maybe the floresent tube for the back light? Quote Link to post Share on other sites
2006_FrontierLE Posted November 3, 2009 Report Share Posted November 3, 2009 What type of vehicle is the unit installed in? Does it have a factory upgraded system (ie Bose, RF)? Did you use a wire harness to avoid cutting the factory plug or did you have to tap the factory harness? Three things I would try. 1) Disconnect the dimmer wire, if it is connected. See if the noise changes. 2) If you do not have a powered antenna or audio amplifier, disconnect the blue wire(s) 3) Remove the stereo from its mount (either the cage or iso mount) and unplug the antenna. Does the radio cut off or the noise change? Good luck, let us know what you find. Quote Link to post Share on other sites
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