radio wont light up

[Jimboe19]

Hi everyone,, just installed a radio/player in my camper,, a vw, beta with cassette player, it works fine but it dosnt light up the panel when on,, have tried another similar radio an it dont light up either,, strange,,all the wiring block looks ok, is there some way of activating the display that ime missing out on,,?? cheers,,

[torbjorn]

The ISO connector on car radios has a separate dedicated pin for panel lights. In a car, this is connected to the dashboard lights so that the car radio's panel can be dimmed by the same control.
Usually, aftermarket radios will light up when just the main supply is connected, but OEM radios may rely on separate supply for the lights.