OBC dim on e30 320i cabriolet

[ogro]

Hi there! I have searched the forum but cant find the answer to my problem. My OBC on a 320i cabriolet (1990 - H reg) is working but the display is very dim. Reading the forum posts, I suspected that i need to change the bulbs, but on removing the radio, I cant see the "square white box" on the side of the OBC - which apparantly houses the bulbs?? There is an oblong white box at the back - which when I remove it has a pcb inside (doesnt appear to do much as nothing changed to the display on removal). Have I got a different OCB, or am I missing something obvious. Can anyone help please??

[Cloggy Saint]

You're missing something obvious! The light bar for the display is on the top right side. Of course it could be missing in which case there would be an empty slot.

[gazza]

it will appear as a white cover on the side but when you slide it out you will see it is about 2 inches long with the 2 bulbs on the pcb
the other one at the back is the code plug

[Brianmoooore]

IIRC, you can see the light bar by removing the radio and it's frame, but you can't remove it because of a bit of plastic in the way.