Windshield washer pump is an essential component of your vehicle that ensures you have a clear view while driving. It is located at the bottom of the windshield washer fluid reservoir and is responsible for pumping the fluid to the windshield. However, like all other components, it can become faulty and need replacement. In this article, we will show you how to test windshield washer pump to determine if it is faulty or not.
What You Will Need
Before we dive into the testing process, you will need some tools and materials. These include:
- A multimeter/tool to check voltage
- A test light
- A jumper wire
- A container of water or windshield washer fluid
Step-by-Step Guide on How to Test Windshield Washer Pump
Now that you have all the necessary tools and materials, let’s dive into the testing process. Follow these steps:
Step 1: Locate the Windshield Washer Pump
The first step is to locate the windshield washer pump. It is usually located at the bottom of the windshield washer fluid reservoir. Consult your vehicle owner’s manual if you are having difficulty locating it.
Step 2: Check Fuse and Relay
Before proceeding with testing the pump itself, it is essential to check the fuse and relay. Use the owner’s manual to locate the fuse and relay that control the windshield washer pump. Check if they are blown or damaged. If they are, replace them and see if the pump works. If not, proceed to the next step.
Step 3: Check Power Supply
Use a multimeter or tool to check if the pump is receiving power. Connect the multimeter to the pump’s wiring harness and turn on the ignition switch. If the multimeter reads 12 volts, it means the pump is receiving power. If it does not, check the wiring and connections for any damage. If there is any damage, repair it and check if the pump works. If not, proceed to the next step.
Step 4: Check the Pump’s Ground Connection
A faulty ground connection can also cause the windshield washer pump not to work. Use a test light to check the ground connection. Connect the test light to the positive battery terminal and touch the ground wire of the pump’s wiring harness. If the test light illuminates, it means the ground connection is okay. If it does not, check the ground wire for any damage or corrosion. If there is any damage, repair it and check if the pump works. If not, proceed to the next step.
Step 5: Test the Pump
The final step is to test the pump itself. Disconnect the pump’s wiring harness and connect a jumper wire to the positive terminal of the battery. Connect the other end of the jumper wire to the pump’s positive wire. Connect the negative wire of the pump to the negative battery terminal. Submerge the pump in a container of water or windshield washer fluid. Turn on the ignition switch and see if the pump works. If it does, it means the pump is okay, and the problem lies elsewhere. If it does not, the pump is faulty and needs replacement.
How can I tell if my windshield washer pump is bad?
If your windshield washer pump is bad, you may notice that the windshield washer fluid does not spray onto the windshield when you press the washer button. You may also hear a whining noise coming from the pump when you press the washer button.
How long does it take to replace a windshield washer pump?
Replacing a windshield washer pump is a quick and straightforward task that can be done in less than an hour. However, the exact time it takes depends on the make and model of your vehicle and your level of expertise.
Can I replace my windshield washer pump myself?
Yes, you can replace your windshield washer pump yourself. However, it is essential to have some mechanical knowledge and the right tools to do the job correctly. Consult your vehicle owner’s manual for specific instructions on how to replace the pump.