hope someone can help me with this

the central locking on my saff does,nt work near does the inteerior lights and dash lights and rev counter all worked fine till the other day then noticed they did,t work after washing it

so anyway checked the 20a fuse and replaced it but just keeps popping the fuse so thought maybe water in some terminals but put a 30a in central locking works but still no dash lights ???

any body got the diagram so could trace the circuit see if theres a broken wire somewhere or had similar problems ? if so hwat cured it ?

any help would be appriciated cheers