My ''06 TC Signature sometimes works or not by using the remote or
door button. The interior latch might open for just a split second and
closes before the deck lid can clear the latch. My suspicion: there's an
adjustment rod for each trunk spring inside the trunk, one on each side.
A steel rod protrudes from one of three adjustment notches in a piece
of sheet metal. Top notch for max tension, middle notch for medium
tension and lower notch for minimum tension (I think). There must be a
tool that allows you to move the rod, but it will take a lot of energy to
move it from one notch to another. My spring tension rods are in the
medium setting and I'd like to move them to the max notch, but haven't
found or tried any tool to do it.
It seems the trunk misbehaves more often in cold weather, but it
happens less frequently in warm weather. The key to the trunk always
works.
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