If its a transit van then you need to locate the release bolt at the back end just inside the back doors on the floor if its plyboarded out then you will have to lift this up to see the release bolt, You turn this anti clockwise beware if you havent used the spare for sometime you will need some patience and a can of wd 40 as they are known to be stiff to undo due to rust
Ian Mechanic, April 2009
