merchauser

when I press the button to open the sunroof, the sunroof motor continues to run on until I slightly press close.


here is the kicker: while attempting to restore the express up feature for the drivers window, I plugged in the wrong connectors and the drivers PW switch would operate BOTH the window and the sunroof and there was no run on! after I connected the correct wires, I got my express up feature and each switch independently worked again and with the SR motor still running on.


since I know the SR motor has the "capability" of NOT running on, I am thinking I need a new switch??

worf928

Is the switch 'sticking' and not returning to rest?

You can test the switch with a multi-meter at the connector to the dash harness.

merchauser

no, the switch is not sticking at all

worf928

I doubt the switch is the problem, but if you think it is, then you should test the switch at the harness connector.

From your original description, it reads like you mis-plugged-in the window/sunroof controller that's under the driver's seat?

merchauser

yes, you are correct I did mis-plug the connectors, but the mistake allowed me to use EITHER the window switch OR the sunroof to simultaneously operate both the window and sunroof with no run on???? a bit confusing?

dr bob

So it worked OK, then the plugs got misconnected later. Now it's not working as expected. Wonder what it could be... Maybe the module?

Any funny smells, melted wiring etc? Analog smoke?

That module integrates functions from the door locks and the various switches, allowing you to open and close all of those portals with the drivers' door key switch. Double-check the connections there, and carefully inspect the wiring between each switch and the module. Then plug each switch back in, one by one, and verify function at each step. My one-year-older car doesn't have those functions or the module so I can't send pics of the plug arrangement.

---

The cars have some cutting-edge-at-the-time "smarts" in them, but a lot of the circuit protection stuff is less than forgiving to mistakes. Better to double-check the various connections carefully before plugging stuff in. When you disassemble stuff, take pictures so you can get things back together correctly. There are lots of wires and modules, and very limited supply of surplus smoke. More than a few members have managed to melt insulation through several conductors in a harness before realizing what happened. There's a cascade effect and it never gets better as you dig in to it. Fair warning given, I hope.

Mrmerlin

NOTE the sunroof will run on for a few seconds till the module senses a change in the duty from the motor then the module will shut off the power.

If this feature is not working then the chances are good you have smoked the module

merchauser

dr bob:
the sunroof "run on" existed from day one. making that mis-plug under the seat gave both the window and sunroof switch the same ability to open and close window and sunroof at the same time with no run on, then when I disconnected that connector it went back to the original scenario.


it seems that the mis-plug "overrode" the run on situation???


no smoke no smell and the situation is more of an inconvenience than anything. I just prefer things to work as they should, so I will continue to pursue a solution


BTW: the complicated door lock functions for the windows and roof operate properly

merchauser

BUMP:

getting more complicated: replace sunroof switch and window control unit and still motor runs on using the switch and the express open feature.

but now I noticed that when I use the key to close windows and sunroof, the motor runs on while the sunroof closes, and since that is happening, it does not "pass" the close function on to the drivers window

thinking that the problem is certainly with the sunroof motor, but I am wondering how the shutdown of the motor works? is there some sort of internal switch in the sunroof that communicates to the control unit that it is time to stop?

thoughts??

928Myles

Have you tried tightening the screw through the rubber clutch? It could be that the clutch is slipping enough that the motor doesn't see enough of a change to switch it off.

Myles

merchauser

Hi Myles,
no I have not and I not familiar with that screw.
can you elaborate a little for me?? thanks

Alan

I too think the sunroof drive clutch is too loose. You need it to not slip too easily so the motor drive circuits can detect the increase in current when it "stalls" at the fully closed position. if it doesn't detect enough of a current rise it just keeps going (until it times out - ~30 sec)

Alan

merchauser

sounds logical and sounds easy! I like that.

can someone tell me how to identify the screw at the motor that I need to tighten?
and do I need to be careful and tighten only a little at a time?

ltoolio

I believe, but it's entirely possible I'm wrong, it's the screw at the bottom of the sunroof transmission. If you tighten it, it will put more stress (probably the wrong word) on the clutch, at which point it might be too much effort on the motor which will then shut it off. If you loosen it, there will be less stress on the motor (potentially down to 0 if you loosen it too much) and then it will either run to the point of closure and shut off will keep running (while not moving the sunroof) for a period of 30 seconds.

StratfordShark

Yes it is the big brass screw on the transmission, accessed via removal of the cover. Mine is extremely stiff to point impossible to turn and that's with refurbed sunroof mechanism that operates very smoothly (I even cleaned old grease off cables before new lubrication), so I don't think you're in danger of over-tightening!