POWER STEERING BELT REPLACEMENT 1997 VENTURE VAN

Here's a video,it may have the same power steering pump as your's. Check Power Steering Level Pontiac Montana 1997 2005 2004 Pontiac Montana...

power steering pump is located on the front of the engine, standing in front of the car that is on the left side. There is a black cap on top that has a short dipstick on it

YOUR DRIVE BELT IS LOOSE OR NEEDS REPLACED.

You can see the power steering pump on the front
of the motor

It along with the alternator ,crank damper & sometimes
water pump,are driven by the same belt ,been that way for
a century

your power steering belt is loose or you need to replace the power steering pump because it is loosing pressure. try the belt first.

The air pump looks similar to a power steering pump, with a pulley and all and it's spun by a belt, at the front of the engine.

check for a belt routing diagram under the hood.

My sincere apologies for the delayed response.
I am personally going back to answer your unanswered questions.

I do not know if you still need this information, but I am going ahead and answering it anyway. You may want to Print the Diagrams for future use.

I am assuming this "van" is a Chevy Venture?
CLICK on the following LINK. It has the Belt Diagrams you will need.
If you would: Before Clicking: Let me know if this helped you, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!
Again my apologies...
http://www.2carpros.com/car_repair_information/year/2000/make/chevrolet/model/venture/2000_chevrolet_venture_drive_belt_routing_diagram.htm

Don't see how one would blow the fuse an not the other . The remote function is controlled by the BCM - body control module or vehicle interface . Regardless ,the module an the switch on the steering wheel both energize the horn relay ! Do you know what a relay is an how it works ?
Check the horn relay

VEHICLE RELAYS Operation Diagnosis

Your van has a serpentine belt, it not only operates the power steering, it also operates the alternator, and the water pump.I wouldn't drive it until that belt is on it, it will over heat and do other damage.