2004 Toyota Avalon Questions

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My wipers blew a fuse when i used my blinker. After looking for problem the toyota mechanic said the motor was hot but could not duplicate the blown fuse. Everything worked fine for 2 weeks then the intermittent portion did not work, it wiped 2, 4, 5 times then paused- just randomly. I replaced the arm switch and now the intermittent run at low speed with no pause at all, so first position is low, second position is low, third position is high. Is there a relay switch somewhere other than the arm-switch on the steering column?
I used my windshield wipers to help remove snow. Now they will not turn on. I replaced the motor once already. It has 202,000 miles
No signs at all. and i just changed the oil with 5 litres of toyota oil and oil filter barely 48 hrs ago. No leakage of oil under the engine.
I noticed the oil was almost dry as the time the engine stopped on highway..
i thought the oil did not guage well and I added more 4 litres of toyota oil to it. Still it did not guage.
in total, i have added 9 litres of oil.
the engine did not start.
Please what could be the problem?
my engine light is on and already took the diagnois test
I checked fuses and all are OK . what do I look for and how do I brepair
My 2004 Toyota Avalon XL when cold after starting will idle low, about 400 RPM, compared to when warm it will idle about 750 RPM, and when working correctly should idle cold with the choke at about 1250 RPM until warmed up. I have sprayed the Mass Air Flow Sensor with Mass Air Flow Sensor Cleaner and have used the same spray to spray the two throttle body ports with the valves closed. I removed the plastic air flow shroud from the air filter and air tube connecting to the metal throttle body. I did not open up the throttle body valves. The were closed at the time of spraying. I also sprayed down the open port of the one throttle which I believe is the low idle opening. There was no dirt that I saw even before spraying. But the car still idles low on cold start up and I have to give it gas the get it to a decent RPM. If I put it in gear, the engine does not die but will either increase RPM to normal idle RPM at about 750 RPM or just stay running until I give it gas to drive. Is there a throttle body section I missing in the cleaning that is still dirty, are the fuel injector ports clogged, are the spark plugs fowling (though it feels like all spark plugs are firing normally), or .....
2004 Toyota Avalon XL
I have changed the wind shield wiper switch/relay assembly lever that is attached to the steering wheel and the same problem exists exactly as the original switch/relay assembly lever I had on the car. The intermittent/INT time wiper delay portion of the wiper timing does not work but the slow (or medium speed) continuous and fast speed continuous (no timed paused) do work normally. I am not sure if there is a timing relay switch under the dash on the driver side as it shows poorly in some schematics I have seen on-line of this. Is this relay only for the XLS? I know the XLS has a timing relay under the driver side dash, but I not sure for the XL model. And I can not see a relay somewhere near the center console or to the left of it. Hard to get around in there. Or is it just the motor has a INT timing relay built into the XL model somehow.
The cover is partialy detached and won't snap back in. There seems to be a clip missing at the top, I want to take it all the way off and reinstall.
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