Hi, I've got a 1994, 5 door disco. Two of the door locks (not boot door) are not holding themselves in the open position correctly when I open the car (with the key, as the remote fob hasn't worked since i bought the car) the bit that rises above the door card, only needs to drop down by 1 or 2 mm, which it often does by its self, and you then can't open the door from out side without putting your had round to lift it back up. I assume a component has gone within the assembly? I've changed the spring on the back door mechanism on a previous disco, is it the same component on the passenger doors? or something else that would cause this fault? Thanks in advance for any help given!