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I have a technical question here
Is there a relay in the harness?
I’ve found the BCM is --VERY-- sensitive to draw on the reverse and cargo circuits, and I can say that a pair of squadron sports is too much. you’re talking 3 S2 PROS here.
No there's never been a relay. And there's never been any issues with the BCM and the brake lights. There is a resistor pack that connects behind the brake light. Sits between the factory circuit and the 3x red led lights.
We've sold TONS of these (from another brand) and have never had issues with circuits or power.