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clickman · 09-23-2022, 10:00 AM

When I release the top latch, the windows don't pop down. When I push the "top open" button there's nothing from the motor.

I've looked at tons of threads and nothing helps with this problem. Most of the stuff I could find was related to the 97-99 MYs, not the 00-04 mine falls into, which only confused the issue as there are addition microswitches for the earlier years and an analog relay/controller vs digital.

I pulled the single microswitch at the latch and tested it for continuity. There was resistance in one position but nothing at the other. So it seems to be working (either open or closed, right? Dummy me I forgot to note which position had resistance and which didn't.)

Then I found a testing procedure in an old Porsche Tech Manual, where you check for power at the carrier of the relay/controller located in the driver's footwell. Of course the relay/controller has the pinouts in German including abbreviations (see pic), so confusing to say the least (if anyone knows what they all are, please let me know). So I tested for power, switched power, parking brake microswitch, the open/close button, and a microswitch which I'm not sure if it was the one at the latch or at the motor in the rear compartment. They all came back with 12 volts, so OK.

I pulled the relay/controller apart and it looks fine. No obviously damaged components or bad or cracked solder joints.

So my thinking is that the relay/controller is bad. As the microswitch at the latch is only on or off, and it does auto-raise the windows when the latch is closed, then either power or lack of power should pop them down when the latch is opened. Which should in turn allow the "top open" button to work.

The relay/controller is about $450 here north of the 49th, so I was hoping to find someone who would loan me theirs to verify my diagnosis, but no luck so far. Funny how people are when it comes to loaning a complete stranger a part out of your car, if only for 5 minutes.

So any thoughts from you tech gurus out there or anyone who's dealt with this same issue?

09-23-2022, 10:00 AM	#1
clickman Registered User Join Date: Jan 2007 Location: BC Posts: 1,312	Convertible top won't go down When I release the top latch, the windows don't pop down. When I push the "top open" button there's nothing from the motor. I've looked at tons of threads and nothing helps with this problem. Most of the stuff I could find was related to the 97-99 MYs, not the 00-04 mine falls into, which only confused the issue as there are addition microswitches for the earlier years and an analog relay/controller vs digital. I pulled the single microswitch at the latch and tested it for continuity. There was resistance in one position but nothing at the other. So it seems to be working (either open or closed, right? Dummy me I forgot to note which position had resistance and which didn't.) Then I found a testing procedure in an old Porsche Tech Manual, where you check for power at the carrier of the relay/controller located in the driver's footwell. Of course the relay/controller has the pinouts in German including abbreviations (see pic), so confusing to say the least (if anyone knows what they all are, please let me know). So I tested for power, switched power, parking brake microswitch, the open/close button, and a microswitch which I'm not sure if it was the one at the latch or at the motor in the rear compartment. They all came back with 12 volts, so OK. I pulled the relay/controller apart and it looks fine. No obviously damaged components or bad or cracked solder joints. So my thinking is that the relay/controller is bad. As the microswitch at the latch is only on or off, and it does auto-raise the windows when the latch is closed, then either power or lack of power should pop them down when the latch is opened. Which should in turn allow the "top open" button to work. The relay/controller is about $450 here north of the 49th, so I was hoping to find someone who would loan me theirs to verify my diagnosis, but no luck so far. Funny how people are when it comes to loaning a complete stranger a part out of your car, if only for 5 minutes. So any thoughts from you tech gurus out there or anyone who's dealt with this same issue? __________________ 2001 Boxster, 5 spd, Seal Grey