While relaxing the other day a car horn started to sound. I decided to go out and investigate and dicovered that it was my '98 Saturn trying to get my attention. After disconnecting the horn (to turn it off) I began looking for the relay to see if it was stuck. After going through the owners manual and the Haynes automotive repair manual I am still at a loss as to where the relay may be. Any clues? Or better yet an exact location would be greatly appreciated.
John
(sent by the wife)

 

Horn relay should be in the underhood junction block (UHJB)-- it is near the battery and has a black cover with a single hand screw that holds the cover on.

The underside of the cover tells you what is what as far as which relay/fuse is for what....

Sometimes it is just crap that bridges the terminals of the horn buttons and causes the horn to stick. If the horn itself was bad it would probably burn the fuse...."Normally-Open" relays usually do not fail in the closed state unless they get stuck that way during operation of the circuit. Assuming that no one was honking the horn, my bet is on the "crap on the horn button contacts"

Derf

 

If it's like my '97 Saturn SW2, as I read it, the relay is inside the horn. This is why the horn has a three wire connector.
Sorry. When I posted this, I didn't realize how old that post is.

 

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Home >> Saturn >> 1998 >> SW1 L4-1.9L SOHC VIN 8 >> Repair and Diagnosis >> Lighting and Horns >> Horn >> Testing and Inspection >> Horn >> Circuit Operation

Circuit Operation

HORN SYSTEM
The horn system consists of an electronic horn, two driver controlled horn switches in the steering wheel, a switch internal to the RKE module controlled by a hand held transmitter, and the interconnecting wiring. The steering wheel switch activated horn system is designed to provide the driver with an audible warning to signal pedestrians, other drivers, etc. The hand held transmitter activated horn system is designed to provide the driver with an audible confirmation when the LOCK button is pressed twice on the transmitter (if programmed).

CIRCUIT DESCRIPTION
Battery is provided to the horn at all times from the HORN fuse in the UHJB through circuit 1540A. Ground is provided at all times through circuits 150HH, 150Z, and the left forward lamp ground. Circuit 28/28AA carries battery at all times from the horn to the steering wheel horn switches and the RKE module. Circuit 28 is grounded when LOCK button is pressed twice on the RKE transmitter, or one or both of the steering wheel horn switches is pressed. This provides a signal to a circuit board inside the horn. The circuit board then switches battery from circuit 1540A to the internal horn coil, causing the horn to sound.

COMPONENTS
Horn Assembly and Bracket
The horn operates over a battery input range of 9-14V at -25°C (-13°F) to 10-15 V at 75°C (167°F).
Sound Level: 95dB (measure at 2 meters in front of vehicle)
Frequency: 380 Hz-420 Hz
Musical Note: G-G# (sharp)
Operation Range: 9-14 VDC at -25 degrees C (-13 degrees F) 10-15 VDC at 75 degrees C (167 degrees F)
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