Did you need to fit a relay as described here (taken from the Cisbo website.)
Originally Posted by Gsi3.2
Q. Would fitting a Parking Sensor Kit to the reversing light bulb circuit interfere with the blown bulb indicator on the dash? If you have a vehicle with bulb failure detection system then you will need to fit a Single By-Pass Relay, this protects the electrical system on vehicles with a bulb failure monitor or multiplexed wiring. Please see our links page for details on where to purchase a relay.