try checking to see if the motor is working . If the motor runs then you have to replace the wiper arms check with your service manual for proper removal and replacement. i would first check the fuse. then the motor and finally the linkage(arms)
You will have to determine if the fuse, the switch, the wiper motor, the linkage, the pulse board or the wiring/connections is at fault before you can fix it.
Cadillac stopped making the Coupe DeVille after 1993.
You can't, and it's illegal to drive with a cracked windshield. You can be ticketed if stopped. However, most insurance policies cover windshield replacement.
fuse
Fuse? Connections? Switch? Wiper Motor? Could be any of those.
Check fuses
its the motor.
depending on year. it could be a number of things. check relays, fuses and motor.
You have a leak. Possibly the drain lines are stopped up or the leak is at the windshield.
Antoine de la Cadillac founded Detroit which was known as "the City of Straits" in 1701. He also stopped the English settlers from going into the Ohio Valley.
Sounds like your master drivers side window switch is on its way out. If you can find a working used one you can save some money. It will interchange with Cadillac Deville, Fleetwood FWD 4 doors from 85-93. Also a lot of the 4 door Olds 98 (85-90) and Olds 88 (86-91) have the IDENTICAL switch.
Chevrolet Camaro stopped using back windshield vents in order to reduce manufacturing costs of the newer model of cars. They had no significant function other than aesthetic.