A connector for connecting a wiper blade assembly to a wiper arm. The system digitally generates a two-tone test signal, and tests the nonlinearities of the receiver using the generated two-tone test signal. A first pixel value is output when the input pixel value is below the lower threshold level. The mounting plate may include a release tab to releasably engage a recess in the base plate of the handle to secure the tab of the handle within the opening of the mounting plate.