Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does not work on my vehicle

I have a '11 Ford Flex. I tried twice to get this product to work and it failed both times. First time, after I installed it, it worked as advertised: nice blue Ford logo switched to red oval when you pressed the brake. But after the first test, the blue light quit working. I sent it back and got a replacement. Again, at first it worked properly but then both blue and red lights quit. I sent it back and bought something else. I do not know if it was 2 defective lights or it just didn't work on my vehicle.