First caravan the groove back is in the gearbox, before changing anything, disconnect it and you have a bridge with a connector and see if the lights turn on, eye the contact has to be open, if you turn on, the bulb changes and already, there is no more tests if you do not turn on the cable, the bridge on the connector does not Complete system that ever but ever is more, now it is normal for a cable to be more tensioned than the other because that is regulated in the wheels and the wear of balatas will depend on singing more turn a wheel than the other, that normal in all the cars, the regulation is interior but only for the length of the hand brake, if you pass and squeeze a lot if it will be brake of the vehicle.