Ground the signal lights to the frame.
Motorcycle turn signal relay wiring.
Attach your turn signals to the switch and wire the left side and right side signal together.
Blue must be by the process of elimination the brake light.
Turn and thread or purchase our 2 x threaded bungs as along as your frame tube is wide normally around 25mm choose your mount location on the rear frame rail and drill out the size hole to allow your threaded slug to slide through ours are 14mm diameter.
Connect a power wire to your flasher relay and from the relay to your turn signal switch.
This is the tail light wire plug three wires and the license plate light two wires by comparing to the turn signal wires we know the black with yellow stripe is ground.
Because the red wire is found in both circuits it must be the power.
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In other words you re going to power your turn signals directly from your battery for testing.
This hot wire can run all over the motorcycle with other different colored wires going from the hot wire to the power destination device.
This is why there are so many colors of wire.
Usually not always just usually the hot wire from the battery is a red one.