HELP!!!........sunroof woes
Thread Starter
Burning Brakes
Joined: May 2012
Posts: 864
Likes: 5
From: Northeast
HELP!!!........sunroof woes
Nice day here in the northeast yesterday. 993 running beautifully so naturally opened the sunroof....good times! Well the 993 liked it being open too b/c now it won't close/stuck open 
May I ask for an opinion of diagnosis so I can determine if it's something I can sort or plan a stealer visit?
Observations:
1. switch probably not the problem (I think) b/c when depressed I can hear a click up at the sunroof as though a motor was trying to be actuated. So there is a signal being sent from the switch.
2. it has been temperamental for a year or so. I would have to depress the switch a few times in a coaxing sequence to get it to work; only in closing....it always opened no problem
3. no motor sound just a clicking with each switch depress
Thanks in advance and appreciate any advice (I know don't drive in the rain
)
May I ask for an opinion of diagnosis so I can determine if it's something I can sort or plan a stealer visit?
Observations:
1. switch probably not the problem (I think) b/c when depressed I can hear a click up at the sunroof as though a motor was trying to be actuated. So there is a signal being sent from the switch.
2. it has been temperamental for a year or so. I would have to depress the switch a few times in a coaxing sequence to get it to work; only in closing....it always opened no problem
3. no motor sound just a clicking with each switch depress
Thanks in advance and appreciate any advice (I know don't drive in the rain
)
Last edited by Ridin Dirty; Apr 14, 2015 at 11:09 AM.
Rennlist Member
Joined: Dec 2002
Posts: 1,689
Likes: 257
From: Utah
This may be your problem. mine was doing the same think and found the broken part when I unzipped the head liner.
https://rennlist.com/forums/993-foru...of-before.html
https://rennlist.com/forums/993-foru...of-before.html
Thread Starter
Burning Brakes
Joined: May 2012
Posts: 864
Likes: 5
From: Northeast
Thanks!
I pulled the liner down, hit the motor a few times/jiggled the wires to it and now it works; but i have a feeling it's going to stop working again.
Strange that means cables are okay, motor works, no obvious signs of damage, but its temperamental.
I pulled the liner down, hit the motor a few times/jiggled the wires to it and now it works; but i have a feeling it's going to stop working again.
Strange that means cables are okay, motor works, no obvious signs of damage, but its temperamental.
Rennlist Member
Joined: Nov 2005
Posts: 238
Likes: 21
From: Sunny West Coast
Last year my sunroof also stuck in the open position. During the diagnostics I noticed a slight twitch at the motor when I pressed the switch indicating a good power circuit. I removed the sunroof and inspected the tracks, gear and cables. I found no mechanical issues but the lubrication on the tracks was very sticky. It’s a very simple system that is susceptible to failure if the sunroof panel does not slide freely. There are no limit switches so the motors are sized to provide adequate power to open and close the sunroof, but not damage the system or car structure at the end stops. I suspect there’s a slip clutch in the motor. The friction in the track can increases over time as the lubrication degrades to the point of engaging the clutch. With continued use in this state I suspect we start abusing the motor and switch resulting in eventual failure.
I recommend periodic removal of the sunroof panel for inspection, cleaning and re-lubrication of the tracks and gear. The cables are suspended in felt so they need no lubrication. They task is actual pretty simple.
I recommend periodic removal of the sunroof panel for inspection, cleaning and re-lubrication of the tracks and gear. The cables are suspended in felt so they need no lubrication. They task is actual pretty simple.
Thread Starter
Burning Brakes
Joined: May 2012
Posts: 864
Likes: 5
From: Northeast
Last year my sunroof also stuck in the open position. During the diagnostics I noticed a slight twitch at the motor when I pressed the switch indicating a good power circuit. I removed the sunroof and inspected the tracks, gear and cables. I found no mechanical issues but the lubrication on the tracks was very sticky. It’s a very simple system that is susceptible to failure if the sunroof panel does not slide freely. There are no limit switches so the motors are sized to provide adequate power to open and close the sunroof, but not damage the system or car structure at the end stops. I suspect there’s a slip clutch in the motor. The friction in the track can increases over time as the lubrication degrades to the point of engaging the clutch. With continued use in this state I suspect we start abusing the motor and switch resulting in eventual failure.
I recommend periodic removal of the sunroof panel for inspection, cleaning and re-lubrication of the tracks and gear. The cables are suspended in felt so they need no lubrication. They task is actual pretty simple.
I recommend periodic removal of the sunroof panel for inspection, cleaning and re-lubrication of the tracks and gear. The cables are suspended in felt so they need no lubrication. They task is actual pretty simple.
