Answer
Aug 28, 2024 - 03:35 PM
To test the ACI 373694 Windshield Washer Pump, you can perform several checks to determine if it is functioning correctly. Here’s a step-by-step guide to testing the pump:
1. Visual Inspection:- Check the Washer Fluid Level: Ensure that the washer fluid reservoir is full. Low fluid levels can cause the pump to run dry, leading to potential damage.
- Inspect the Pump and Wiring: Look for any visible signs of damage, corrosion, or loose connections around the pump and its wiring harness.
- Activate the Washer Pump: Turn on the ignition and press the washer switch inside the vehicle. Listen for a humming or buzzing noise coming from the pump. If there is no sound, it could indicate an issue with the pump or electrical supply.
- Check for Power at the Pump:
- Use a multimeter to check for voltage at the pump's electrical connector. Disconnect the pump and set your multimeter to DC voltage.
- With the ignition on and the washer switch activated, probe the connector terminals. You should see around 12 volts.
- No Voltage: If there is no voltage, check the fuse, relay, and switch for faults.
- Voltage Present: If voltage is present but the pump does not operate, the pump itself may be faulty.
- Inspect the Fuse: Locate the fuse for the windshield washer pump in the vehicle’s fuse box. If the fuse is blown, replace it with one of the same rating.
- Test or Swap the Relay: If your vehicle uses a relay for the washer pump, test the relay or swap it with a similar relay in the fuse box to see if that resolves the issue.
- Direct Connection to Battery:
- Disconnect the pump from its wiring harness.
- Use jumper wires to connect the pump directly to the vehicle’s battery. Connect the positive terminal to the positive wire on the pump and the negative terminal to the negative wire.
- Pump Runs: If the pump operates when connected directly to the battery, the issue may lie within the vehicle's wiring or controls.
- Pump Does Not Run: If the pump does not run even with direct power, it is likely defective and should be replaced.
- Inspect the Pump Inlet and Outlet:
- Remove the pump from the reservoir and check for any blockages or debris in the pump inlet or outlet.
- Clean any debris found and reassemble the pump to the reservoir.
- Test Fluid Flow:
- Reconnect the pump and activate it while observing the fluid flow from the washer nozzles.
- Weak or No Flow: If the fluid flow is weak or non-existent, it may indicate a blockage in the lines, a faulty pump, or a leak in the system.
- Inspect for Blockages or Damage: Ensure the washer nozzles and hoses are not clogged, kinked, or damaged. Clear any blockages and repair or replace damaged hoses.
By following these steps, you should be able to diagnose whether the ACI 373694 Windshield Washer Pump is functioning correctly or if there are issues with the pump or other components of the windshield washer system. If you find the pump is faulty, it will likely need to be replaced.
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