"fuse box blows" isn't very informative at all.
Precisely which fus(es) blow and when? Cluebat,: you may need to search online for fusebox layout.
Then it's diagnostic interpretation to eliminate the item(s) fed by those fus(es).
You could also find one of the many Vauxhall enthusiast forums and ask there (with enough concise, detailed info naturally)
3jrj, March 2022
