Master Washer Fluid Warning Light

Hi, I have a 2008 Renault Master diesel with 166502 km. The washer fluid low warning light is permanently on, even though the reservoir is full, and the windshield washer system doesn't work. I checked the fluid level sensor, and it seems okay. I've also cleaned the spray jets. Error memory also stores an error. Any ideas?

4 comment(s)

I had a similar issue with my Master. The error memory can be misleading. Have you checked the pump itself? It might be faulty, even if the sensor seems fine. If the pump isn't working, no fluid will be sprayed, and the error will persist.

Thanks for the suggestion. I haven't checked the pump directly yet. Where is it located, and is it easy to access? Also, how would I test it to make sure it's actually the problem?

The pump is usually located near the bottom of the washer fluid reservoir. Access can be a bit tight depending on your specific setup, but it's generally reachable from underneath the vehicle. The easiest way to test is to check if it's receiving power when you activate the windshield washers. If it is, and it’s still not pumping, then it's highly likely the pump has failed. I would recommend taking it to a workshop.

Okay, thanks! It turned out to be the pump. The workshop confirmed it and replaced it for 25€. Now it is working perfectly. The warning message disappeared after clearing the error memory.

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