Sidecar crashes Amiga

[leofoe]

I know I have a difficult question about the Amiga 1000 with A1060 Sidecar. I think this combination is not very widespread, but I hope someone has any indication where to begin troubleshooting.
When turning on the combination, the Amiga crashes with a guru after running the first command in the startup-sequence, which is BindDrivers.
It works fine without the Sidecar. Same thing happens with this Sidecar connected to a different A1000. :-?

[leofoe]

I left the Sidecar for a while but decided to take it apart one more time.
First I did was make a new WB-disk from the installer-disk. No more binddrivers problems now. But the A1060 is not recognized: "Couldn't find Janus library".
What I did so far: Clean all connectors, reseat all chips. I also found that 3 pins of the sideconnector were not OK. I resoldered them so they make contact again.
Unfortunately these actions did not have any effect.
I am stuck now because I have not the slightest idea where to begin troubleshooting.
Any hints appreciated.

[leofoe]

After all these years I picked up this problem again. Used a multimeter to check the 86pin CPU slot in the Sidecar. Bingo! Pins 80 and 82 pins didn't make contact. Managed to solder these and voilà, the Sidecar works again.
Next problem: the 30MB Western Digital Filecard doesn't work. At first the harddisk didn't spin. After fiddling with it it spins, but isn't recognized.