Bluetooth Added to Stock UM6 Radio

I added a Bluetooth board to my stock 1991 GM UM6 stereo. I couldn’t find schematics for the stereo and the instructions for the Bluetooth board weren’t accurate. I ended up using the switching mechanism between the cassette and radio (activates when a cassette is inserted) to turn in the Bluetooth board. I also disabled the cassette motor so no noise comes from it. The downside is that I can’t play cassettes any longer, but overall I’m very happy with how this turned out.

[@jiggity76]

Just genius!

[@user-vk2cd9qw7i]

Do you know what bluetooth board you put in there? I'd like to try something like this in my 93