All-
I have to replace my aux water pump. It's drawing too much amperage and already fried my CCU. I have four questions:
1) How difficult is this R&R?
2) I haven't looked to see where the pump is located. Where is it?
3) Will I have to drain the coolant for this procedure?
4) I need to procure a fuse holder and fuse to prevent CCU from burning up again in the future. Where can I get these?

Scored a used CCU already & still have two old ones which are both fried. May try to make 1 good one out of the 2 bad ones. Thanks all.

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'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)