It runs from the metal water line on either side of the block into the throttle body. There is also a metal line behind the block. What I did was pull off the blower, remove the whole line from the back of the block. Then I took some heater hose and ran it from one side of the engine to the other. I left the lines on the throttle body open, but I figure it can't hurt since now there isn't hot coolant floating through the throttle body. My 92 didn't have this.
I just bypassed it completely. LT-1 guys have a similar setup and they bypass it by connecting the source together with heater hose and thats where I got the idea.