1. Check the fuse. The screen wash pump is powered by a fuse, so if the fuse is blown, the pump won't work. The fuse for the screen wash pump is usually located in the fuse box under the hood of your car. Check the owner's manual for the exact location of the fuse.
2. Check the wiring. If the fuse is not blown, the next step is to check the wiring to the screen wash pump. Make sure that the wires are properly connected and that there are no breaks or damage to the wires.
3. Check the pump. If the fuse and wiring are both in good condition, then the problem may be with the pump itself. You can test the pump by disconnecting it from the wiring and applying power directly to the pump. If the pump does not work, then it will need to be replaced.
4. Check the screen wash reservoir. If the screen wash pump is working, but no fluid is coming out of the nozzles, then the problem may be with the screen wash reservoir. Make sure that the reservoir is full and that there is no obstruction in the line between the reservoir and the nozzles.
If you have checked all of these things and the screen wash pump is still not working, then it is best to take your car to a mechanic for further diagnosis and repair.
