98 horn problem
Thread Starter
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New User
Joined: Jan 2004
Posts: 8
Likes: 0
From: placerville,ca
98 horn problem
My 98 has an intermittent problem with the horn sounding on it's own. It will blast several times at various time intervals and then be ok. Happens a couple times a day, while driving or stopped. Any ideas? I've pulled fuse # 10 to disable this annoying problem.
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
Two things initially.
The horn blow switches are underneath the driver side air bag module in the steering wheel. The switches are powered through the air bag sliding contact and ground through the steering column. That's an area to check for shorts or maybe a bad switch.
Also, the horn relay might be going bad. It's located in the power distribution box under the hood. Check your owner's manual for exact location. You can test the relay as follows:
Use a Digital Multimeter to check for continuity between terminal 2 and all other terminals. If resistance is 5 ohms or less between terminal 2 and any other terminal, replace the relay. If resistance is greater than 5 ohms, continue the test. Use two jumper wires to connect relay terminal 1 and terminal 3 directly to the positive battery terminal. Set Digital Multimeter in the volts position and check for voltage at terminal 4. If battery voltage is not indicated, replace the relay. If battery voltage is indicated, connect a third jumper wire to terminal 2 and ground the jumper wire to a known good ground. Check for voltage at terminal 5. If battery voltage is not indicated, replace the relay.
The lines below represent the terminals of the relay and their corresponding numbers:
142
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_5
_3
The horn blow switches are underneath the driver side air bag module in the steering wheel. The switches are powered through the air bag sliding contact and ground through the steering column. That's an area to check for shorts or maybe a bad switch.
Also, the horn relay might be going bad. It's located in the power distribution box under the hood. Check your owner's manual for exact location. You can test the relay as follows:
Use a Digital Multimeter to check for continuity between terminal 2 and all other terminals. If resistance is 5 ohms or less between terminal 2 and any other terminal, replace the relay. If resistance is greater than 5 ohms, continue the test. Use two jumper wires to connect relay terminal 1 and terminal 3 directly to the positive battery terminal. Set Digital Multimeter in the volts position and check for voltage at terminal 4. If battery voltage is not indicated, replace the relay. If battery voltage is indicated, connect a third jumper wire to terminal 2 and ground the jumper wire to a known good ground. Check for voltage at terminal 5. If battery voltage is not indicated, replace the relay.
The lines below represent the terminals of the relay and their corresponding numbers:
142
|||
_5
_3
Cargo Master
Joined: Mar 2001
Posts: 2,757
Likes: 70
From: Elk River, MN
Follow Rockledge's directions. Also check to see if you have an anti-theft switch on the passenger side fender behind the air cleaner that looks like a plunger button. Sometimes they see a false signal on windy days or if the aluminum hood flexes.
