How is this even possible? Were working on a 300cd and non of the windows work at all. We swapped in good known good switches, nothing. I directly power the window motors and they work great. The fuse is fine and I replaced it with a new one and checked continuity. Im not getting any power to the switch sockets though. My question: Is there a relay? Google searches are of no avail neither is alldata.

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1981 300SD 512k OM603