Hi.
I am trying to repair my son's car, It's a Nikko Digger RC car, but the circuit board was sulphated, I tried to cleaned it but I accidentally cut some wires. And I can't find the schematics a wiring diagram or at least a photo where the conecctions are depicted, I have tried to find it everywhere but it have been impossible, I dont know if someone can give me a little orientation.
The circuit board number part is No.RP7300S2E
Thank You.

 

I have already found the solution.
You can see how the wires are connected in here https://arduinodad.wordpress.com/page/2/
And you can see the IC configuration in here file:///C:/Users/Eva/Downloads/Datasheet.hk_ht8a978blwe_7689836.pdf