Hello all,

I am hoping someone can shed some light on this step that's had me scratching my head for hours. In the workshop manual it states:

9. Disconnect the glass regulator wiring harness plug.
10. Power up the glass regulator to line up the two glass
securing screws through the two holes in the top
bracket.

There seems to be a logical leap here and I would really appreciate elaboration. The electrical connector has 4 wires going in: orange and black seem to be about size 16 and then green/red and white/yellow look to be about size 20. What needs to happen to power the regulator?

 

Some updates! I will answer my own questions posed in the OP for the good of the community. I will also fully describe my method for the benefit of curious troubleshooters.

This post is a part of me trying to fix a malfunctioning tonneau cover later motor and I've been mixing and matching posts from here and pistonheads along with the workshop manual and also a bulletin someone else posted. The bulletin had a few gaps in the steps that I've been figuring out as I go. I wouldn't wish this time consuming experience I've had on anyone so I better start documenting some of it. I hope to ultimately make it a diy post with pictures and maybe a youtube video but let's not set our hopes too high.

The rear quarter window regulator! As you probably know, these rear quarter windows do not have dedicated buttons and only move as a part of the convertible roof sequence. I couldn't find the wiring diagram so I had to figure out what does what among the 4 wires going into it. I used a razor blade, and, after slicing my finger open, cut away some insulation on each of the 4 wires going into it and attached a multimeter from each wire's now-exposed metal area to ground (I will have to repair these later). I then turned the car on and operated the convertible roof sequence. Here were my observations:

With key in ON position,
Orange wire 12V ; Black wire 0V ; Green/red wire 12V ; White/yellow wire 12V

When the window was moving down, Green/red wire changed to 0V. This tells me that grounding the Green/red wire with 12V power still available to Orange and White/yellow causes the windows to go up.

When the window was moving down, White/yellow wire was 0V. This tells me that grounding the White/yellow wire with 12V power still available to Orange and Green/red causes the windows to go down.

My goal is to remove the left side rear quarter glass so I completed the roof movement for an open roof and turned the car off. The windows are now in down position but must be raised to access the two screws to remove the window glass. So how will I move the rear quarter windows into the up position with the roof tucked away and without using the convertible roof movement button?

I took a portable jump-starter battery pack and connected wiring as follows:
From Red alligator clip of the battery pack I sent a jumper to Orange wire and a jumper to White/yellow wire.
From Black alligator clip of the battery pack I sent a jumper to Black window regulator wire.
I then connected a simple alligator jumper wire from Green/red wire to the metal frame a few inches away.

I flipped on the battery pack and both rear quarter windows went up! I immediately turned off the battery pack when the windows were up.

Now I can finally get back to my original task: accessing the tonneau latch motor assembly!