Interior lamp fault.

hi.

I have a 2003 Freelander 5dr and the front interior lamp does not come on with the door. The lamp was not working at all but I noticed the central circuit on the pcb was corroded. I’ve put a bridge across this and got the lamps work but they still do not work on the doors. The central lamp does work from the doors though. There is also no switch to select the operation of the lamp from doors to off. Can anyone help?

The circuit is still faulty. The light comes on when the CCU grouds the light. As the rear light comes on, the CCU is working just fine.

The is the aerial seal is also faulty, (which caused the corrosion to start with).