1988 sl300 r107 window/interior light fault

[Ben r107]

Just purchased a 1988 sl300, it's a lovely example with just a few little issues, when I got the car home I realised the interior lights didn't work 4 in total one in each foot well and one either side above sunvisors, all had been disconnected I connected them back up and all worked in accordance to the switch on the dashboard, permantly on, off or on with doors, I have now noticed the electric windows will only work with the door open unless I turn the interior lights off can anyone help?? Thanks