After leaving the installers I had three hits on the way home, one just two blocks away from the instalation shop. I purchased a M40 & M20 for my F150 FX4. I have three heads in front, one over licence a the other two located behind grill next to the headlamps. The rear is the same with heads between tail gate and bumper. I had the led's mounted above and below for the front and rear on the console, with a single switch located adjacent, to led's to turn them both off. On all hits I received both leds and audio alerts went off. Is this normal or a installation mistake. Would the common on/off switch be a problem?