Advice please

wye

Hi , I have a 2012 swift challenger sport due to go away in the morning .

Been putting bits in the van thought I would have some music..... no radio, no power in 12 volt TV socket and the vision plus boaster is dead too!

I have checked the fuses which I think are relevant , auxiliary and electrics also 12 v ,socket,  the fuses appear ok , all the 12 v lights are ok, 12 on fridge ok and pump runs too.

I would be grateful for any suggestions please.