Westfalia 3 way fridge, water pump and test light not working

[Diesel02]

I have just bought my first VW T25 Vanagon. It's from 1990 and runs like a dream.
Unfortunately, my 3-way refrigerator is not working. The same goes for the battery and water test lights, as well as my handwash water pump.
Is there a common fuse for these?

My refrigerator doesn't work on 12V, 220V, or gas.

[mioba]

Door pillar next to cabinet in a black box (size of a matchbox). bullet fuses. Get some spares