Wonky sunroof!

[crazyd]

Every summer I try to fix my crazy sunroof, and every summer it still does the same thing. It almost always opens UP. But when I try to close it, it takes three or more button presses for it to close. And when I try to get it to slide back, it has to drop down and close up twice before it will slide back - if it does at all, which is rarely.

I've replaced the switch and I've replaced its little controller board. What else is there??

[Psych0matt]

Mine will always slide back and then slide forward, but a lot of the time wont go into vent mode, but when it does will close just fine I grabbed a spare switch last weekend at the junkyard, I didn't know anything about a controller board...?

[crazyd]

Sounds like you've got the same problem in reverse, doubt that switch will fix it...

[Psych0matt]

Sounds like you've got the same problem in reverse, doubt that switch will fix it...

I kinda figured that, which is why I haven't put it in yet. Maybe just a wire rubbed through or something

[urbex]

Although that switch you have in the car doesn't look too great anyways with how loose it is. It probably wouldn't be that bad to have a new one anyways.

[crazyd]

Nobody else has had this problem?

[tornado_735]

I did on my old '94 sedan. I'm willing to bet money it's the sunroof relays.

Go to the junkyard, and find a couple of GP's with a sunroof. Yank the headliner, and harvest the wiring with the little relays. That wiring harness with the relays has connectors on both ends IIRC. Get a couple of them, and install them on yours. I say get a couple of different ones because you could pull one with the same failed relays.

[crazyd]

I did that already, but you're right I may have pulled one with the same failed relays. I'll see if I can find another one and try it again, maybe that's it.

[Psych0matt]

Good to know, and that would make perfect sense too

[crazyd]

Scoured the junkyard today and found a couple Eldos with a sunroof, an Aurora, and a '98 GP with HUD, but I doubt any of them would've had compatible wiring. Even found a '95 with a manual sunroof, which must've been aftermarket.

I think I've still got my old harness somewhere, is it repairable?

[iroc2]

if anything ive had issues with it going back so its open. mostly when its like 50 degrees (early spring, i wanted my windows down after a 0 degree winter lol)

[crazyd]

Bringing this one back, I've been checking the yards around here every time I go and have had a tough time finding the replacement relay box. I found a similar one in a Saturn, but it didn't work. If anyone comes across one let me know, it barely works now.

[GnatGoSplat]

If relays are the problem, you could always open the relays and fix them. Most people don't think to open them, but usually they come apart using a small flathead screwdriver and are really easy to clean any oxidation or burnt spots off the contacts. I always repair relays rather than replace them.

[crazyd]

It's actually a little box with a circuit board inside. I've inspected it, repaired some cracked solder joints and it was WORSE than when I started!

[GnatGoSplat]

You might also check the condition of the limit switches. I have a vague memory of my sunroof not working right due to crud in one of the limit switches. I cleaned it out with a pin and that fixed it.