I need electrical diagram for a childs SNUL SLA 90 fourwheeler?

Answer 1

Nice try!!! :-)
Most likely NOT going to find it here. Nor on the 'net.
I can't think of a resource that even might have a link.
Try to identify the actual manufacturer (not marketer) and do as Google. See if they have a "contact us" button, or a "tech Support" button.

Good Luck