Chrysler Repair Questions? Ask a Mechanic for Answers ASAP
Most likely the fluid level in the pump is low due to a leaking hydraulic lift cylinder.
The workings for the top are located behind the back seat and sides. You'll need to pull out the back seat to check the fluid level and if there is a leak it will be apparent at that point.
If you need help getting the back seat out, just let me know.