water traps

I can hear water trapped on the passenger side of my Clipper convertable, I have checked the drain holes under the bonnet where the wiper motor sits, they are OK........could anybody throw any light as to where this water could be trapped and how to unblock etc.......

Check all drain holes in the passenger side door.  If these are blocked, then water could be accumulating inside the door - this might be indicated by a soggy door card.

Maybe you are hearing the coolant flowing through the heater core?

WHERE ARE THE HOLES AND DO I HAVE TO TAKE THE DOOR CARD OFF

On the underside of the door.