Before you do that see if you can hear the lift pump priming on the second click of the key.
If you can it's unlikely to be the brown relay also cleaning the contacts usually isn't the issue as it'll be the sealed to moisture when connected. It's more likely to be the relay its self. £16.50 from here http://www.ebay.co.uk/itm/331622197479?_...EBIDX%3AIT
If you can it's unlikely to be the brown relay also cleaning the contacts usually isn't the issue as it'll be the sealed to moisture when connected. It's more likely to be the relay its self. £16.50 from here http://www.ebay.co.uk/itm/331622197479?_...EBIDX%3AIT