They make kits that are sold in most autoparts stores for repairing the broken wires on the rear defogger. Pretty inexpensive.
The only repair for a blown head gasket is to replace the gasket.
see link below
Pick up a Haynes repair manual for the vehicle. They have wiring schematics in them.
Check out this video: http://www.youtube.com/watch?v=whOOsv_EA8s
It's like repairing any other vehicle; you must first figure out what's wrong, find out which component has failed and either repair or replace it.
Selling price of a 1996 Saturn?
NOT AT ALL
Do a Google search on this (1996 Nissan 300zx repair manual CD) This is your repair manual that can be downloaded and the Black Dragon link on this page is one of the best sources for parts of all kinds. TomballPI
A 1996 Saturn vehicle will only use R134A refrigerant. I was a Saturn technician for years in Saturn Dealerships.
where do you install a neutral safety switch on a 1996 saturn
As most vehicle defogger controls operate in a similar manner, and as I'm not familiar with your make and model, this answer will be generic in nature. Rear defoggers generally draw a fairly large amount of current, and therefore that current does not pass through the cabin control switch. That switch controls a special type of relay [a time delay relay]. When you press the switch to turn the defogger on, an electrical pulse is sent to the time delay relay which closes, passing electrical current to the defogger grid. Within the relay is a timing circuit which, after a finite period of time, is supposed to release, and open the relay switch contacts, turning off the current to the defogger. From your question, I suspect that your defogger relay has FAILED IN THE ON POSITION. Usually, this failure is fatal to the relay, which must be replaced. I have a Buick Century wagon 1996, and I ran into this problem. Have you noticed if the defogger switch lights up when you hit the brake? If so, you have a bad connection somewhere. The center brake light is on the same circuit as the defogger, so you may notice that the center brake light does not light up when you hit the brake. So if this is what's happenning to you, you either have a burned out center brake light, or the defogger terminals in the rear window aren't making a good clean connection. They are located on either side of the window near the top. What I did to fix this was to solder a small piece of metal to the terminal that was not connecting and it was thick enough to make the connection. So the center brake light works, and the defogger now works exactly as it should. Hope this helps.
Saturn Bomberman happened in 1996.