Tuner list radio wiring diagram

[PhilipC]

Hello all!

I can't seem to find a wiring diagram which is helping me understand the wiring on the back of the radio but I am trying to find the "illumination" or "dimmer" wire which dims the radio lights when using the dimmer switch on the driver's side.

There are 3 connectors, yellow, black and brown and I've tested all 3 connectors and each wire coming out of them for voltage using a multimeter, tried operating the dimmer switch to get a voltage but no luck, however, I've removed the dimmer switch panel and probed the back of the connector for the dimmer switch and found the coloured wire which operates and gives voltage when dimming or lighting up the LCDs.

thanks, Phil