hi , can someone please help me , i have a 52 plate chrysler grand voyager , i charged the battery & when i went to put the battery back on , i accidently put the terminals on the wrong way round which caused a spark , since i've put it on the right way the central locking does not work , the immobiliser does not work , the car will start but when i turn it off the ignition lights stay on until i push the key back into the ignition , then my speedo clock & other clocks flash once & go off , could anybody help me fix the problem