Some vehicles come with the sensors in the bumper shells but are not connected unless the vehicle has certain options packages. Might this be the case with yours, or did they once work and now do not?
2018 Subaru Crosstrek, 2014 Audi Q7 TDI, 2013 Subaru Forester, 1969 Chevrolet C20, 1969 Ford Econoline 100, 1976 Ford F250
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