Hmm. I guess a wire is pinched. Come on, you've gotta do better than that. I'll give you an educated guess..
From what you're saying.. One of your high beams don't work; you couldn't turn off your windshield wipers, so you turned off the headlights and the wipers turned off.. My best guess would be a "hot-to-hot short". This is best described as, "I honked the horn and my driver side windows goes up or down". You also said that your turn signals won't work either.
Let me straighten this out in my head.
-Combo Light Switch turns on the headlights
-Pull the switch forward and the high beams turn on but there's no light coming from the low beams and high beams
-Turn signals don't work either
Now according to the wiring diagram, the Combo Light Switch is hot at all times. Meaning there's power to it. So that means that the switch selects the wire that gets power and sends the power to the relay. From there, the relay will pass on the power to either the low beams, high beams, or turn signals. From there the wire grounds out the circuit and it is completed.
Well since everything else seems to work except for the high beams. I can pretty much see that the Under-Dash Fuse/Relay Box for the headlight circuit is in essence, faulty.
This is what I think is happening. Everything works fine, but once you turn on the high beams, everything goes dead. This is because there's either a grounded circuit in the relay, or a open circuit in the relay. I believe that by turning on the high beams, the relay some how connected all the wires to the high beam wires. Then from there, the wire probably grounded somewhere.
That's my best guess so far. But if I had the car right here in my driveway, I can test the relay and the whole circuit. I'd tell you how, but then I'd have to write a book. So if you've got any questions, let me know..