The horn on my '99 Saturn SC1 failed so I called a few auto parts stores only to find out that its a dealer only item. Saturn used a 3 wire horn with an integrated relay and a replacement costs a whopping $85.00

The problem with having the relay attached to the horn is over time water gets into it and it fails. Most vehicles have the horn relay in the fuse box where it belongs, and use a 2 wire horn.

My nephew is scrapping his '86 BMW so I was thinking of taking the horn and relay and jury rigging it to work on my car. Should be easy enough to do, don't you think?

Here's a wiring diagram I found: