1987mercedesl90diesel2.5turbo
 

I ordered new headlight switch, and while installing my grandchildren
interrupted me when I only had three more connections to do. I lost out
on where to put the next wires. I was wondering if I could could get a
wiring diagram. It is the wires that go higher up on the switch. My parking
lights front & rear don't come on. also my radio doesn't come on. I just
installed a new battery. thanks! dieselmanmickey.

Here's a website with free wiring diagrams for your car.
http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1987/190D/WIRING%20DIAGRAMS/

Good luck with the repairs! :)

Edit: This particular page has the headlight switch wiring: http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1987/190D/WIRING%20DIAGRAMS/2996.pdf