^^^ that assumes that the wire gauge through the low speed relay is the same gauge as that through the high speed relay. what I would do instead is wire it in a "OR" configuration so the low speed relay is actually just turning on the high speed fan relay. that would be the correct way to bypass the low speed.
2001 ZX3 2.0L Zetec-
Hatch Nation #42
Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)