Horn comes on by itself

EZ1969

MEMBER
GMC JIMMY

2000 Gmc Jimmy. 4.3l.
My horn comes on for no reason. It will beep once or twice then it might beep again and stay on. I can't seem to trace what is making it shoet out or whatever it's doing. If I take out the relay or the fuze for the horn it stops. I've checked all the wires cable and connectors that I can get to. Help!

5 Replies

CHEVY22

MECHANIC
1,375 POSTS

You might want to swap out the relay with one that has the same part number (should have one right next to it ) and try that, if the horn still blows we may need to look at the switch, strat simple with the relay
let me know

jim

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Saturday, February 24th, 2007 AT 6:04 PM

EZ1969

MEMBER
11 POSTS

I swapped relays and it still does it. I don't know if it's related to the horn problem, but my digital odometer blinks on and off too?

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Sunday, February 25th, 2007 AT 10:59 AM

CHEVY22

MECHANIC
1,375 POSTS

Next step would be checking the button under steering wheel, pull all air bag fuses before attempting this the switch may be bad as long as you checked and swapped out the relays

thanks
jim

oh and leave some feedback if you were happy with your help, we all donate our time here helping others free of charge

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Sunday, February 25th, 2007 AT 11:22 AM

BHUGG

MECHANIC
157 POSTS

Does your car have an alarm system that might be tied into the horn?
If so, that may be the problem.

This guide can help

https://www.2carpros.com/articles/how-to-reset-a-security-system

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Wednesday, February 28th, 2007 AT 12:02 AM

EZ1969

MEMBER
11 POSTS

Now i'm having trouble with the engine. I'm lossing power and it's hesitating real bad when I accelerate. I never replaced anything in to fix the horn problem but it went away. What electrical problem would be related to both of these issues?