Changing coolant pump B

Hi guys,

I've got the engine light on my car it's a CR140, I have scanned it with carista and it's showing as the coolant pump B circuit open.

Had a little look online and it's something I want to attempt and replace myself instead of paying the £250 I've just had quoted for getting it done at a garage.

Will be really helpful if someone with much more knowledge can hopefully guide me.

Thanks in anticipation