Hmm. Stripped out PSE from new car, attacked PSE from old car ---- a complete mess. corroded contacts all over. Old one works in the old car but I'm not going to risk it in the new one!
Opened up the new PSE and examined. Looks brand new and no apparent dry joints. May just attack it with a soldering iron and some protective laquer just while I have it all out.
After all the investigation on the PSE unit I'm starting to look elsewhere. According to this
info the dome light and roof is controlled by unit N10-3 and my problem looks more likely to be nearer to that box so that will be my next avenue.
The odd flashing of the dome light and partial operation of the easyroof unit and other things are starting to smell of an earth fault somewhere!
Cigarette lighter and glovebox light now working! Turns out fuse F1-31 was popped. Visually I inspected it perhaps 5 times and thought it was OK. Then I tested it with a meter and it was actually open circuit!
Now investigating the WIS documents to try to find the door switches and the central locking switch to fault find those two circuits. ( Dome light on and unlock but no lock function )
Finally got an old version of the WIS data up and running on my PC .....
Door switches are on the wiring diagram for Central Locking.
Interesting discovery ..... The seat relay ( known for its dodgy soldering ) is involved in the whole PSE thing so no wonder there are weird faults reported sometimes.
Partial working of the roof traced back to the Easyroof unit. The ABS and ESP lines were wired incorrectly. The chirp sounder was wired backwards so fixed that too. So now the easyroof is working fine.
The onlt problem left is the interior light staying on! Everything else works great. The boot latch switch works great and the signals get to the right places, the door switches appear to be working. The alarm works. Just that blasted light!
The light is driven from unit N10-3 and the door switches go to the PSE. so the PSE must be signalling the state of the doors to N10 by CAN bus.
If I disconnect and reconnect the PSE the interior light goes out once then it reverts to staying permanently on!!!!!