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I can't speak to your electrical issues, or which temp you should run, but I've got you on your steering. Welcome, BTW. Your steering gear box could be an issue. Does it behave the same with the engine not running? If you turn the key to acc, and turn the wheel, does it do the same thing? If it does, your steering gear box is blown. It is as easy to replace as your pitman arm, and will cost you a little, but it isn't bad. I did a write up on how to replace your pitman arm, found in the tech section. Best of luck to you, and again, welcome!!!!