Brig993

I just got my car back from the body shop and the third bake light isn’t working unless you pull the **** for the rear window defroster which then lights up the third brake light. It seems the shop mixed up the wires. Can anyone give me some assistance to correct this? Why does the wiring up there look like? I cannot get back to the shop for a while to have them do it so I need to correct it.

pp000830

Easy to get to and fix. The wiring can be accessed under the interior rear upholstered cover below the window that the speakers are mounted in and the wiper motor is covered by.. Just a few screws and it removes in one part. The wiring is all exposed.
Here are screenshots of the wiring diagram that lists the wire colors and the shared wiring harness plug X27 and its pin positions both devices use. If the shop inadvertently mixed up the pins in the plug it most likely can be pried apart and the pins repositioned in their correct places.
Andy

Brig993

This is perfect thank you!

pp000830

Please post the source of your problem and how you resolved it once things are fixed.

E30M3

Correct me if i am wrong but wasn't this mixup the reason why some 993 owners who retrofitted a High Mount 3rd brake light/spoiler were shattering their back glass?

Brig993

During reassembly the shop mixed up the defroster and CHMSL wires. Thank you for posting the wiring diagrams it took about 15 mins to remove the rear deck trim and correct the wiring.