Windshield wiper relay control

   
Hey yall so i am confused about why 87 and 87a are connected between the relays. As I see it, the switch gives it a ground for high low speed, but I'm confused on how the relay power and grounds work. I am still learning. The circuit breakers at top are all burned up and j am expecting a short somewhere. The circuit breakers have path to ground at fuse box which is also a little confusing. If anyone can help I'd appreciate it. I am curious to find where Danner talks about this type of circuit design as well. I don't remember any from switch inputs and most were computer controlled. Thanks 

87 and 87a are connected between the relays for low speed. i cant discern how the wiper control switch operates without the full diagram but i am going to assume the wiper control switch sends voltage, just because...

Thanks for the help. My mind gets boogered up sometimes. Hopefully the rest of diagram and power distribution uploaded. The circuit breakers burned up and I have no power. There's no voltage at the switch and interior lights are not working now either but that could be something that I did. What checks would you make? Motors work fine 

Again

Power distribution 

substitute light bulb across burnt circuit breaker. if it lights you have a short to ground so move stuff or disconnect stuff until it goes out or use an amp clamp to find where the current is finding a path to ground with minimal disturbance.

Knowing the year make and model would make it much easier for anyone trying to help to look up service information.