I think you have two non related problems here.
If the light that's blinking on the dash, is that little
light bulb icon thingy, it means that you have a daytime
running light burned out. The fix to this is obvious.
As to your wiper motor running at only one speed, it
probably means that your wiper motor is damaged.
I'm not sure if the speed controller is something
you can get at or not, but I doubt it. You probably
need to replace the motor. I'd check junk yards first.
FriPilot
fuel filter
Perhaps your radiator fan is staying on after the car is turned off. I have recently had this problem, and googled it. And someone else had the same problem.
Get the carbon canister checked out I had same problem after get coils replaced on my clio
more likely to be a faulty coolant sensor or the thermostat is faulty and staying open
Sounds like you have a short in the main wire that goes from the computer to your gauges it doesnt have anything to do with your fuses.
Moving, advancing, walking, running
There are little black boots covering plungers in the door that can get worn down. I found that if I glue a nickel to the door where it presses on the plunger when closed, it fixed the problem. Hope it fixes yours!
cancer
I believe there isn't one, i have a '91 LeSabre and it doesnt have one. 87- 91 Lesabres are exactly the same cars, so it seems like you have a problem with your headlight staying on all the time. If that's the problem then i cant help you.
Problem with emission system have vehicel scanned to determine problem
More than likely the alternator is defective. Drive to your local auto parts store where they will check your charging system for free.
Cylinder is bad need toreplace