Need help with wiring for GS300 99 stereo

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03-15-09, 04:57 AM

J-Aristo

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Need help with wiring for GS300 99 stereo

Someone please hook me up. I've been all over the web trying to find this. I hate paying for something that I can do myself. I recently bought a double din Alpine. I know what the colors are for the Alpine wires but totally lost when it comes to the wiring schematic for the Lexus. (Alpine does not make a dash kit for the 99 GS300) Nobody will tell me what colors mean what when I call a radio install shop. They tell me its confidential. Installation for this ranges from $50-$150. What a crock huh? All I need to do is match the wires.....if only I knew. Again somebody please hook it up. my current stereo is on its last leg.

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03-15-09, 09:43 AM

lexusscturbo

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You need 2 Toyota harnesses...Take off the OEM amp..Then plug a Toyota Harness in there..
Take off the OEM HU. Plug a Toyota harness there..
From the OEM AMP to the new HU run correct colored speaker wires (match up the speaker wire colors).Find a good ground.And power up the 12v should work correctly. As far as dash kits..Metra or OEM Toyota have dual din kits.