robert_sky7

Spider rain light sensor fault

I've got a 1999 Renault Spider with a gasoline engine and I'm having issues with what I think is the rain-light sensor. The error memory is showing a fault, the automatic wipers aren't working, headlights won't switch on automatically, and even the speedometer dimming isn't functioning. It's weird, and the lights are always on. Anyone else experienced this?

A 1999 Renault Spider was experiencing issues with the rain-light sensor, causing automatic wipers, headlights, and speedometer dimming to malfunction, with lights remaining on constantly. The problem was suspected to be related to sensor calibration or an electrical issue, potentially exacerbated by a non-original windshield affecting the sensor's gel pad. A workshop diagnosed bubbles under the gel pad as the cause, leading to the replacement and calibration of the sensor, resolving the issues.

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I think I had something similar on my Spider. It sounds like a sensor calibration issue, but could also be electrical. When you say 'error memory', is that a generic OBD reader or something Renault specific? And does your Spider have the same windshield as original?

Thanks for the quick reply! The error was read with a generic OBD reader. I'm not sure about the windshield, to be honest. I bought the car used, how would I know if it's the original? And what do you mean by sensor calibration?

Okay, a generic reader might not give you the full picture. The windshield matters because there's a gel pad where the sensor sits, and bubbles can form under it, messing with the sensor. I'd advise getting a proper diagnostic at a workshop. If it's the gel pad, it can cause all sorts of weird issues with the light and rain sensor, and it’s best to have it professionally checked. A new sensor with calibration might be needed.

Thanks for the insight! I took it to the workshop as you suggested. Turns out, there were bubbles under the gel pad! They replaced the sensor and calibrated it. The total cost was 62€. Everything's working perfectly now!

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RENAULT

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SPIDER