Where is the horn located on a 98 saturn sl1 and the relay itself

The horn system consists of a single horn, a horn relay located in the underhood fuse block, and driver controlled horn switch in the steering wheel. The horn system is designed to provide the driver with an audible warning to signal pedestrians, other drivers, etc.
Operation
Voltage is supplied to the horn relay coil and contacts at all times through a 10 amp HORN fuse, located in the underhood fuse block. When the driver pushes the horn pad, driver air bag module, the circuit completes and energizes the horn relay coil. This causes the horn relay contact to close. When the contact closes, current travels to the horn and the horn emits an audible warning.

If the old horn had one terminal than the horn was grounding through the spot where it monted to the car. The new horn has two terminals so one is power and one is ground. Hook the wire from the car to the power side. Make a jumper wire from the ground side of the horn to the spot it mounts to the car. Make sure that spot is clean metal so the wire makes good contact.

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the problem is the horn diaphram is weak and you will have to replace the horn assembly.the numbers on the fuses is the amp rating of the fuse not voltage for your information.

switch in the steering wheel bad, relay bad, horn bad.

Get your owner's manual out of the glovebox and find the fuse panel. I believe it is behind a velcro attached panel to the left of the front passenger's knee. When you take the cover off there is a paper in there explaining what each thing is. Locate the horn relay and pull it out, that will quiet the horn. Possibly the relay is bad and replacement could fix it, however I would put my money on the switch in the steering wheel being bad. If you cannot find the horn relay, look under the front left bumper in front of the battery and just pull the wires off the horn itself to quiet the thing.

The light should go out after you replace the sensor that should be in the front of the vehicle.You can check the fuse for the horn. However, some of the airbags that don't come from a dealers, don't deploy, but there is no way of knowing that until you are in an accident.

you test for power and ground before replacing horn. horn can be held in by a blot.

Sounds like you have short to ground somewhere, I would check the wires near the horn itself and if they are ok check the clock spring.

see if you can find the horn itself (often behind the grill) and test it by applying 12v and ground directly to the two terminals (you can use jumper wires to the battery terminals or a portable jump starter). if it blows it rules out the horn. if it doesn't it is the switch, fuse/relay or wiring.

They relay is on the horn itself. That's why a replacement horn is a dealer only item that's $85. You may need to do some creative wiring with a generic relay. Good luck.