i was taking off my car battery and when i touched the screw with the pilers, sparks flew and all the electricity in the car is not working now! what did i do?
You have popped some fuses, or perhaps burned up some components, like voltage regulator or relays, or worse, burned some wires. You have generated some business with a car repair shop.
Try recharging the battery first. You probably shorted the battery and may have damaged it beyond repair. A new battery should be all you need to do.
