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Here is a picture of mine. On the left hand side you can see a blue relay, there is one circuit breaker below the relay (you can just see it in the photo) and one circuit breaker above the relay.
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There is a relay high up inside the passenger side of the dash, next to the stereo unit or passenger airbag, which controls all the central locking from the remote. I know because I fried it when I...

A friend had his central locking stop working on his cruiser and it was a faulty relay, not sure where it would be located on a Patrol though as they love to hide them where you can't get to them.