1996 Nissan Altima - windshield washer fluid keeps spraying (resulting in winshield wipers not stopping) even when in OFF position?

SOURCE: 1996 nissan sentra windsheild wipers not working

This is the relay switch and its located inside the dash board. the part itsefl will cost 40.00

SOURCE: CRANK SHAFT POSITION SENSOR 20002 NISSAN ALTIMA

1st, Nissan had a recall on Crank position sensors for 2002-2006 Altima's. Check with you dealer before you go doing any repairs. You may discover you can get your car repaired at no charge.
NHTSA Campaign ID number :O7V527000
Symptom: Erratic behavior. Stalling and no starts and very difficult to diagnose due to the time frame in which the component actually malfunctions. The warranty should not be limited to the original owner.
I would also need more specifics as to which engine you have so I might assist you in where the location of the sensor is. The Altima had a 4 and a 6 cyl engine offered that year.

SOURCE: How do I access the windshield wiper assembly?

You have to remove the wiper arms by prying off the black platic piece over the nut. Remove the nut and the wiper arms. There should be 5 places on the black plastic piece that runs the length of the windshield. Remove 4 of them by prying them out. The one is the middle is a screw. Pull away the plastic piece and you should have access to the mechanism below. I think you need to replace the linkage if it has fallen off.

SOURCE: 2002 nissan sentra windshield washer fluid not

Assuming the reservoir has washer fluid in it - when you activate the washers with the key on do you hear a hum from the pump? When you activate it do you see fluid coming out under the car? If any of the lines are damaged the fluid may not be travelling where you want it to. If the pump is not working altogether check to make sure the wire is plugged onto it. Check the tubing from the pump to the connector under the hood. If your fuses are good and the pump is not working at all have the plug checked for power. Pumps go out, but the cause is usually something more simple and less expensive.

SOURCE: 2000 nissan xterra...windshield washer fluid pump

On the drivers side of the vehicle just behind the front bumper is the washer fluid reservoir. The washer pumps (2 - one for the back and one for the front) are located ont the face of the reservoir.

1) Drain the resevoir. (You can reuse this fluid, so put it in a clean container)
2) Disconnect the wiring harness for the problem pump.
3) Remove the sprayer line.
4) Remove the pump. It is held in by being snapped into a channel on the resevoir and by the rubber grommet. This may take some elbow grease.
5) Remove the old grommet.(If your new pump came with a new grommet)

Installation is reverse. Usually new pumps come with new grommets. If not, it is ok to reuse the old one.