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If one side raises, it's not the motor.
A single motor drives 2 transmissions (Lft, Rht) via a dedicated drive cable to each. The Transmission in turn raises/lowers both the Top Lid links and 2 push rods @.
The likely culprit is the drive cable. Another likely suspect might be the transmission itself.
Access the area and swap drive cables. Hook to a portable drill and see if the transmission now drives the assembly. If so, it's the drive cable. If not, it's the transmission.
Each has been known to fail. The square-end Drive Cable ends round-off with time and can no longer be turned by the motor. And the Transmission's internal gears can strip.
Whichever part it is, once replaced, the whole top assembly (both sides) will need to be simultaneously synchronized.
Care should be taken whenever operating this assembly until fully synchronized because damage to the Top Lid (Convertible Cover, Tonneau, whatever you want to call it) can easily result.
There are plastic end links on the Top Bow push rods (not the Drive Cables as erroneously mentioned), and these do break. But, if it were the Push Rods, the Top Lid would still function, though likely be damaged.
Aftermarket push rods are available with metal end links. But, the OEM end links are designed in plastic specifically to break first rather than bend or tweak the frame members. Personally, I would not switch to the aftermarket metal ones.
The OEM push rods can break simply from fatigue causing great frustration and hence the appeal of the ones with metal end links.
But, if using the metal ones, you're going to damage the Top Frame eventually, and this is a more complex and expensive repair than simply replacing the push rods.
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