hi all just need to pick a few brains, in trying to upgrade my old manual heater control unit to a led type now all is working but no fan speed control and where the original connectors went into the rear of the old one which controled the fan speed there is no connection on the new led type. what must i do to rectify this daft situation. oh and by the way the gear box is fine turns out to be the water pump, phewww