Endoman wrote:
Still no joy with heater appears to be IC4 on PCB which controls mixer flap and heater valve solenoid. Found a cheap controller and guess what that has IC4 burnt out.
The the window regulator failed glass stuck at bottom of door. I had fitted a cheap replacement which lasted about 1 year.
I had a new regulator but the motor was seized on my old arm which I still had. Took the cover plate off. freed it off, cleaned and lubricated and got it working again. I was a siezed sintered bearing at the end of the pinion which will probably fail again but for now a cheap fix to get me through winter with a dodgy heater.
I feel for you there fighting through electrical gremlins.... I'm afraid your testing and progress is far beyond my knowledge to help on your plight... sorry

best of luck with the replacement CCU...
I've had another bout of DME and electrical issues on the 968 necessitating a removal of the passenger footwell electrics and tidying up some seriously dodgy soldering - this is an example of the butchery under the fuse box

Soon neatly resoldered complete with heatshrink into this

After everything was refitted, carpets and all, I reconnected the battery and what you adam and eve it - that damned DME relay started buzzing again
I feel "time served" at this now, so unscrewed the top of the fuse box, lifted up the right hand side slightly, buzzing stopped... put it all back down again, fuse box lid on and fired her up - perfect!
After all the work on the electrics, we took the 968 and Boxster out for a run with the Tipec lot in Cheshire & Staffs yesterday - weather as perfect! My mate took the 968 and we took the Boxster.... both got suitably filthy

a few pics of the day




