Upgraded my stereo and I'm having issues... looks like I made a mistake in the wiring. I couldn't find any information on it... but without going into detail my question is this:
For older E34s (pre-harness) there's a two-pin plug... on the old radio the wires are yellow and white, but at the other end of the plug they are red and black. One is power and the other appears to be illumination. Which is which?
I can probably just measure it, but my car is quite a distance away (I've decided to make an adapter). Hoping to get a quick easy response on here or a link to wiring info (I couldn't find any more than a photo in all my Googling)... testing is plan B.