Hi All,

Trying to solve an issue with my sons 1995 300 TDi.

Interior light comes on when you manually switch the switch on the dome light, but will not come on when you open the door.

Have changed the MFU with a unit that has been tested.

Have tested my sons dome light in my 1996 300 TDi and it works.

So I now investigating all of the door pin switches, but my question is, where do all of the door pin wires end up, as I thought I would also check the whole wiring to make sure there are no breaks in the wires going to the door?

Also, his rear demister switch seems to not work either - no click from the fuse box relay as if it is trying to switch it, so maybe thinking dodgy switch? But anything else to check whilst I have the voltmeter out?

Any help appreciated.

Cheers

Hi, the door switch inputs are going into the MFU, you should get earth when you open the driver's door on the PG wire pin 18 of MFU's plug(C205) for the lamp to come on... if you get that input when you open the door and the lamps are still not coming on you must check if that earth is coming out ffrom MFU's pin 1 and if it does the problem is between that point and the lamps relevant parts attached but you can go deeper in this https://smallpdf.com/file#s=28eecf7a-e01e-411e-a246-ad6bafa89734

Perfect, will give me more to check this weekend