My alarm system has stopped working. I set the alarm off and the indicators flash but no noise from the siren I’ve swapped in another siren and still nothing.

I’ve plugged in the iid tool and it’s telling me led open circuit.

I’m assuming it means the one under the interior mirror so I’ve swapped that for a spare and reset faults but it’s still not working and the faults still present.

The led doesn't flash when set so I’m guessing the iid tools correct

Has anyone had similar or had a mirror apart and replaced the led.

I’m trying to get it open but afraid of breaking the glass. Current: 16 my2016 Range Rover l405 4.4 sdv8 Aruba gold & 11 MY2011 RANGE ROVER L322 4.4 TDV8 ZERMATT SILVER

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59 MY2010 Range Rover Vogue L322 3.6 TDV8 Zermatt Silver
53 Range Rover Vogue L322 4.4 V8 Java Black
98 P38 Range Rover 2.5 DSE Champagne Gold

its normally the siren thats at fault...check connections and make the replacement is ok..

Thanks Stan

My own research and thinking was the siren.

However I’ve tried a replacement that I’ve had kicking around my garage and also bought a second hand one from eBay and neither are working.

Or I’m just having lots of bad luck with second hand parts. Current: 16 my2016 Range Rover l405 4.4 sdv8 Aruba gold & 11 MY2011 RANGE ROVER L322 4.4 TDV8 ZERMATT SILVER

Previous
59 MY2010 Range Rover Vogue L322 3.6 TDV8 Zermatt Silver
53 Range Rover Vogue L322 4.4 V8 Java Black
98 P38 Range Rover 2.5 DSE Champagne Gold