Sorry, it's not a relay. Here is what I have.
Qiorange Flash Strobe Controller Flasher Module for LED Brake Tail Stop Light 12-16V
https://www.amazon.ca/dp/B01J2UZ4TU/..._dYocDbTHA3BFJ
Just wondering the easiest spot in the frs to find the brake lights wires and attach this device.
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