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LMC Truck

Username Post: Dumb Horn Question        (Topic#344162)
Bill K.b 
Senior Member
Posts: 4366

Loc: upstate NY
Reg: 10-24-05
04-19-17 11:45 PM - Post#2687411    

My '02 van the horn worked fine until it got super cold out, then it just quit when it was regularly below freezing for a while. Nothing when you hit the button. One time it did work going down the road, but quit within a few minutes. Well, it had passed inspection so I figured when it warms up I'll have to figure out what's not working and change it.

I happened to check it again once it finally got somewhat warm and it works again.

What's going on here? The horns themselves, maybe have water in them (they're down in on the inner fender below the master cylinder), or the relay has issues? Maybe there's even no way to check until it gets cold again.

Those who can, do. Those who can't, criticize it on the internet.

1988 G20 van 5.7L - driver.
1993 3500 dually 5.7L NV4500 - tow truck
1991 G20 van - parts truck

Plus cars for swap and sale
&yes, I once tried a frame swap on a 51 Chevy.

LMC Trucks
Posts: 316
Loc: North Carolina
Reg: 01-10-05
04-20-17 04:14 AM - Post#2687429    
    In response to Bill K.b

...likely just build up of corrosion on contacts. You can pull it apart and clean them...or, just really push/hit the horn hard & it'll blow. (Mine didn't blow for years & I dreaded having the inspection, but the inspection station always "made" it blow by pushing super hard. Then, I finally got a "roundtoit" & cleaned the contacts.) Mc

McLeod -- 1999 Tahoe LT, '03 2500HD Ext. Cab.

Posts: 345

Loc: East Texas
Reg: 02-02-06
04-21-17 06:36 AM - Post#2687585    
    In response to McLeod

Mine will work in some positions and not in other positions. If I am driving and want to honk the horn, I have to push the button and then jerk the steering wheel to the right a little.

Not recommended for high speed traffic


2003 S10 Blazer 4wd (wife's)
2001 S10 Crew Cab (wife's mail truck)
1996 K1500 (mine)
1979 GMC 3/4 ton 2wd 4spd with a "Gilley's" bumper sticker, my first brand new truck.
2006 K1500 Company Truck
2006 K2500 NV4500 4.10's

LMC Trucks
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