Anybody know the color codes for the stereo amp in an early 89 535im. Trying to install new 200 watt jvc radio and bypass the amp. Not much seems to match the color codes from the radio to the amp on one single plug. It has a white plug and a black plug. which is input and which is output? I've already run new ground wires to all speakers and let me tell you, it is not an easy task. I should have just gone ahead and ran everything new. If anyone can help, I sure would apretiate it. I do know the color codes at the radio, just not at the amp. thanks, Dizzy