Hello ,I have a parking sensor module. I accidently touch the wire that goes to the buzzer with a 12 volt live from a car battery . Now when I connect the buzzer wire to the module it makes a constant tone Before the tone would only come on as you approach the sensor and then as you got really close it would be a constant tone. The voltage that goes to the buzzer was 1 to 6 volts at stage 1 to 3 of detection and 11.78 at stage 4 of detection Now its 8 volts constant and when you get close goes to 4 volts I have attached a picture the 3 wires red,yellow and red with black are lives and neutral. http://postimage.org/image/51kv6jus/ The grey wire connects to the buzzer looking at the circuit board would there be anything obvious that might of blown? thankyou for any replies.