How to find out the rear brake light cable path and check brake switch is good or damaged motorbike

How to find out the rear brake light cable path and check the right and left brake switches on the motorcycle.
The first step we must know is the color of the battery output cable path after the ignition is on, right, if the Honda type is black, Yamaha brown, Suzuki orange and Kawasaki white. Then the next step we check the cable path is as follows:
1. check the 12 volt battery current after the ignition is on right and make sure the current reaches the socket pin before entering the brake switch either right or left. if there is no current then we check the fuse and contacts.
2. Check the pin of the brake switch socket, make sure there is current either right or left, if there is no current then the brake switch is damaged.
3. then check the output cable from the brake switch that leads to the rear light, and make sure there is current coming out of the brake switch either right or left. and also make sure the mass cable line where the lamp is attached to the body or motorcycle frame, if the honda is green, yamaha black, black suzuki white stripes and black kawasaki yellow stripes.
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