Porsche 944 Turbo Sunroof Operation and Maintenance (1986 - 1989)

All sunroofs on the Porsche 944s and 951s are raised and lowered by two lifting arms at the rear edge of the roof.
On Porsches produced before February 1986, there is a gear box between the two lifting arm mechanisms. This gear box has a single gear, which moves the lifting arms via two short lengths of drive cable. The guide tubes for the short sections of the flexible drive cable are routed such that the drive cables are directly engaged in the teeth on the lifting arms as opposed to using a plastic drive gear in each lifting arm housing. On cars made after February 1986, the lifting arms are operated by plastic gears (one for each lifting arm mechanism). The plastic gears have a small set of teeth that operate the lifting arms. They also have a large set of teeth that are driven by a flexible cable driven by the sunroof motor. The sunroof drive motor assembly is located in the rear hatch area on the left side behind the carpet.
This article will deal with the early sunroofs.
To operate the sunroof in the open or closed direction, the ignition switch is turned to the "ON" position. To release the sunroof the ignition switch must be in the "OFF" position. If the sunroof fails electrically, it can be operated manually. However, operating an early sunroof manually is difficult at best and should only be done if absolutely necessary. This is covered in the article on maintenance and repair of the sunroof.
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