18 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTop will not fully retract
Leading reported evidence
Disconnect )....it was purely a mechanical swap
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed · Original poster
No electronics were touched (connected or disconnected)....it was purely a mechanical swap.
Leading evidence: 'Disconnect )....it was purely a mechanical swap' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check position sensor' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
I replaced my '01 Top with one from a 2005 Turbo Cab.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Performed · outcome unconfirmed · Original poster
Where can I find a diagram as I did not locate all of those limit switches when I replaced the top.
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Discussions that contain suggestions
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Suggestion
Check the position sensor on the drivers side cylinder behind the trim panel near the window regulator, make sure it is connected.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
18 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I tried to download a video of the situation but it did not work.
I replaced my '01 Top with one from a 2005 Turbo Cab. The only difference that I could find is that the rear window is glass and larger that my original plastic window. It took me a day to do the switch but all the hardware was identical. I have watched the widow as it is being "stowed away" and it lays flat without problems. I have looked for any other obstructions and have found none. I tried to download a video of the situation but it did not work. The Top goes down to the point where the "clamshell" starts to close....then it just stops, pump still runs briefly. Any thoughts, ideas, etc. would be appreciated.
Thanks
Check the position sensor on the drivers side cylinder behind the trim panel near the window regulator, make sure it is connected. If it doesn't "see" the top at full open position it will not close the clamshell.
No electronics were touched (connected or disconnected)....it was purely a mechanical swap. The mechanicals on the old & newer tops were identical. The Top goes up & down fine, latches and unlatches fine.....just stops when the clamshell is about half closed. The pump changes sound and the end as if the Top were encountering an obstacle of some kind.......can't find it!
It is possible to screw up the calibration of the top without touching the electronics.
Here's a hypothetical:
Suppose you remove the old top when it's in the 50% open condition. Then, you install the new top in the 75% open condition.
Now, when you go to retract (open) the new top the rest of the way, it moves through 50% of its motion (since that's where the potentiometer was left on the old top), and the system expects the top to be fully open at that point. But it isn't. Still 25% to go. So it hangs up.
Consider that the calibration might be off.
Did you check the sensor I mentioned in post #2? The sensor does not have to be removed or reinstalled when the top is removed, BUT if you don't hit the slot in the sensor arm when reinstalling the drivers side hydraulic ram, it will do exactly what you are describing.
Thanks........Tomorrow is "fix it day". Where can I find a diagram as I did not locate all of those limit switches when I replaced the top. I'll advise on my results............
Tony.....the seller did not say what the donor car was. He just said that it would fit my '01 (along with a bunch of others). When I got the Top..."2005 Turbo Cab was written on the frame. I measured, very carefully, and they were identical.....the only exception being the larger "glass" window.
https://rennlist.com/forums/graemlins/nono.gif
OK....I got a good lead from a fellow Renn guy. He said that my small plastic window was meant to fold as it retracts.....and that's why my top won't close all of the way. Then I found this 2000 with the same glass rear window that I just installed. I couldn't get any info on it....but, geez, it must open & close, no? Still stumped. And...no bad relays.
I can't help with your problem, but I had heard the same thing about tops. Specifically, I remember reading that the frame mechanism of the 996.2 is different from that of the 996.1 in order to allow the glass rear window to lie flat.
If that 2000 has a 996.2 top, I'd guess that someone figured out how to put a 996.2 frame mechanism on a 996.1 car. That said, are you sure that's a glass window? Maybe it's just the light, but from that pic it looks like plastic to me.
Yeah...it does to me as well.but, I've not seen a "plastic" window that big on a 996. My original plastic window was about half that size. The car pictured is a salvage so, perhaps just dirty!?! I'm working on a video to post on YouTube and link from here so members can actually see and hear what's going on. I try to do my own troubleshooting and as much wrench work as I can as the nearest Dealer is 165 miles away. Local (65-80 miles) "foreign" mechs. just don't get it.
Could be the angle the picture was taken at, or maybe you're replacing an aftermarket top? My top is original, and the window could be the same size as the one in your pic ... the distance between the edge of the window and the seam of the top looks about the same:
I replaced an original top with an original top. The frames were identical....unbolt my original light grey, much smaller, with a slightly green tinted plastic window with what the dismantler said was an '05 Turbo Cab top....in black, glass window. KoB.....you did not say, but is your window plastic? If it is and it folds when retracted....then, I have probably found the problem.....glass doesn't fold! Duh! Sad.....I could have saved a grand!
Yup, original 996.1 top with plastic window. And yes, it folds when retracted.
There are a few threads about aftermarket tops ... IIRC, GAHH makes the closest-to-OE top, while some other people have gone with Sierra Tops and saved some money.
I assume you'll be able to resell the '05 Cab top, but I don't envy you the work of removing and replacing it.
