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Hello I will help,
You want this relay to operate another set of lights and not have the original brake lights work at all? Will you need to reverse the situation so the originals work again?
Do you have a testlight or voltmeter?
OK, you will use the light green wire, I am troubled that the wire colors you list are not the same as the diagram for the brake light switch. I am seeing a 4 wire connector with white, green, yellow and brown. Thw white is power, green out to the lights, yellow and brown to the cruise.
Can you confirm the year?
You want the green wire not the green/silver then
Great, let me know if you have further questions