Reconnecting the battery I stupidly let let it spark to much, now reverse lights and instrument gages and dash light don't work. This happened once a few years ago when AAA jumped a dead battery. AAA guy couldn't connect his cables sparking the connect a lot... When car started, same dead dash and gages. Dealership fixed saying it was a fuse. Odd thing was, took them four days to get the fuse.
Checked all fuses and all have continuity, so all good.
What and where else can I check?