Could be a bad latch. Could be there is another broken wire that you couldn't see (sometimes the wire breaks, but the insulation stays intact - look for places in wire that are not nice and round).
Now that I think about it though, if the car thought the truck was open, there should be a light on the dash, so, it might be something else.
Let us know what you find.
Last edited by dknightd; 02-02-2013 at 10:36 AM.