Re: neff 1051
Without the full model number of the appliance it’s impossible to help you. However I cannot fathom how you could possibly “mix up all the wiring?” as (usually with Neff ovens) both the lamp and fan element are accessed from inside the oven cavity. 😕
Also, some Neff oven fan elements have a 3 wire connection configuration. Could it be, perhaps, that the all important 3rd wire has fallen down behind? 💡
Beyond that and to reiterate Don’s earlier comment, we cannot provide wiring diagrams. For that you would need to contact Neff directly to see if they are able to oblige?….Sorry! 🙁