kreator Posted September 1, 2009 Share Posted September 1, 2009 I have a 1998 GS300 with OEM nav and radio system (integrated controls for A/C and touchscreen lcd). I want to put in some aftermarket amps and subs, but does someone know where I can tap in into the oem stereo? Do you know which wires (colors) are the speaker wires directly out of the radio, going to the factory amp behind the dash? I want to divert to sound through a Rockford Fosgate 3Sixty pre amp unit, but I'm not sure if it can handle the power (voltage) coming out of the amp... however I can't find the sound wires going into it.... the oem amp which I found behind the glove compartment seems to control the radio and cd changer output as well. However the sound coming from the headunit doesn't seem analog, but a digital feed.... is that correct? I can't find any info on this matter any suggestions? Quote Link to comment Share on other sites More sharing options...
1990LS400 Posted September 1, 2009 Share Posted September 1, 2009 Here is a wiring diagram from ARRC for the nav/audio system in a 98 GS300. I know nothing about doing what you want to do. I've seen several forum threads lately that document how people got rid of the OEM nav in a 98-00 GS by using an HVAC control module from a non-nav 98-05 GS and installed a double-DIN aftermarket screen based stereo/nav with all sorts of larger speakers and amps. I don't remember anyone trying to pump up the OEM 98-00 audio but it's probably been done. 1998_GS300_nav_audio_diag.pdf Quote Link to comment Share on other sites More sharing options...
kreator Posted September 1, 2009 Author Share Posted September 1, 2009 Here is a wiring diagram from ARRC for the nav/audio system in a 98 GS300.I know nothing about doing what you want to do. I've seen several forum threads lately that document how people got rid of the OEM nav in a 98-00 GS by using an HVAC control module from a non-nav 98-05 GS and installed a double-DIN aftermarket screen based stereo/nav with all sorts of larger speakers and amps. I don't remember anyone trying to pump up the OEM 98-00 audio but it's probably been done. Hi Jim, that seems to be just the diagram I was looking for.... THANKS!!! Quote Link to comment Share on other sites More sharing options...
1990LS400 Posted September 1, 2009 Share Posted September 1, 2009 Whoops! I didn't notice that you are in the Netherlands. The diagram I supplied is for the North American market and may not be applicable to your car. Quote Link to comment Share on other sites More sharing options...
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