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Cabriolet rear side windows have me stumped


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My cabriolet came with what I'm calling shark's teeth. When the top is down the rear side windows are always up and are locked that way (unless I press the roof receiver microswitch). When the top is up you can press the rear window up switch the rear window will go down. When you press the rear window down switch the rear window will go up. The front windows operate normally.

I tried reversing the wiring for the up and down functions. After swapping two pair of wires for each window the windows go down and up correctly when pressing the switch and go down and up correctly when raising and lowering the top. However, when I go to start the car with the top up and the windows up the car lowers the rear windows about an inch. I think the logic is to try to raise them to make sure that they are closed (at least that's my theory).

Next, when looking at regulators online I noticed that my motors had different part numbers. So I put the wiring back to normal and swapped in new motors (including built-in control boards that looked correct for my car). No difference.

At this point I am stumped. I don't know if there is anything in the PST settings that could reverse the operation of the windows but it seems unlikely. Perhaps I need to keep the wiring reversed and there is a PST setting that impacts starting window location?

Thanks. Any insights are appreciated.

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No flood damage listed in it's history or as far as I can tell from working on it so it's unlikely. The rear windows are just reversed for some reason. I'm guessing it's something a previous owner or mechanic did when fixing a regulator but I don't know the history.

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Have you checked to see if the plug is loose on the cab top controller under the back?

Edit: Reason why I bring it up is that the SmartTop device has the ability to affect how the rear windows operate, maybe there is a short there?

Edited by 987_RDC
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Yay! I found the problem. Someone rebuilt the regulators incorrectly (carrier is connected to the wrong wire). Now to see if I can rebuild them or if it's time to buy some new ones. Thanks for taking the time to read and your suggestions RDC. Sometimes it's nice to feel like you're not alone in beating your head against a wall.

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