where is the horn in my '78? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

willett · 02-27-2009, 03:49 PM

hey guys, my horn quit working and i'm trying to find the "honker" under my hood.

where is it?

are there any common problems with the horns on these trucks?

willett · 02-27-2009, 04:22 PM

okay so i pulled the horn button assembly apart and i can make an arc between the sprung pin and the body ground.

i'm assuming that this is good because it means that i am getting power up the colum?

*okay i put a multimeter on and i'm getting 13 v at the colum

flamingbig10 · 02-27-2009, 04:46 PM

the horn is behind the grille next to headlights

menace121978 · 02-27-2009, 04:46 PM

there is 2 i believe. both in the grille under the hood latch. one on each side. maybe the wire(s) just came unclipped?

menace121978 · 02-27-2009, 04:47 PM

nice!LOL just a few seconds behind

willett · 02-27-2009, 05:12 PM

what color is the lead that powers the horn?

flamingbig10 · 02-27-2009, 05:32 PM

Quote:

Originally Posted by menace121978

nice!LOL just a few seconds behind

that happens on here all the time

I think wire is dark green, if you open the hood on the driver side its routed by the headlight through the radiator support if I remember right

willett · 02-27-2009, 05:39 PM

okay thanks guys i found it.

its not quite the shape i was looking for!

now where is the horn relay hidden?

flamingbig10 · 02-27-2009, 05:45 PM

Its a few inches above or side of the fuse panel, don't remember since I have a universal wiring harness

heavychevy79 · 02-28-2009, 05:42 AM

Yeah it's above the fuse box.
Most of the time it's the horn ring in the column, but I've had a few of those horns go bad on me too.

willett · 02-28-2009, 10:28 PM

i still have power at the colum,
i have tried to arc with a screwdriver but nothing, so i am hoping that it is the relay

heavychevy79 · 03-02-2009, 04:33 AM

Put a test light on the horn wire and get someone to push the button.
I'll bet the horn is bad.

willett · 03-02-2009, 04:43 PM

thanks guys,
after f*cking around for a few hours it turns out it was just the relay.

d'oh!

02-27-2009, 03:49 PM	#1
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	where is the horn in my '78? hey guys, my horn quit working and i'm trying to find the "honker" under my hood. where is it? are there any common problems with the horns on these trucks? __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

02-27-2009, 04:22 PM	#2
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: where is the horn in my '78? okay so i pulled the horn button assembly apart and i can make an arc between the sprung pin and the body ground. i'm assuming that this is good because it means that i am getting power up the colum? okay i put a multimeter on and i'm getting 13 v at the colum __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square" Last edited by willett; 02-27-2009 at 04:27 PM.*

02-27-2009, 04:46 PM	#3
flamingbig10 6.0 powered square Join Date: Feb 2008 Location: Mesquite texas Posts: 3,459	Re: where is the horn in my '78? the horn is behind the grille next to headlights __________________ Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326 Last edited by flamingbig10; 02-27-2009 at 04:46 PM.

02-27-2009, 04:46 PM	#4
menace121978 Registered User Join Date: Jan 2009 Location: orangevale, ca Posts: 3,626	Re: where is the horn in my '78? there is 2 i believe. both in the grille under the hood latch. one on each side. maybe the wire(s) just came unclipped? __________________ "Dennis the Menace" 1978 Silverado (2wd, 1/2 ton, short bed)complete nut & bolt frame off restomod LQ9/4L80E MY LS SWAP/FRAME OFF BUILD BOOK 2006 TBSS way too much to list

02-27-2009, 04:47 PM	#5
menace121978 Registered User Join Date: Jan 2009 Location: orangevale, ca Posts: 3,626	Re: where is the horn in my '78? nice!LOL just a few seconds behind __________________ "Dennis the Menace" 1978 Silverado (2wd, 1/2 ton, short bed)complete nut & bolt frame off restomod LQ9/4L80E MY LS SWAP/FRAME OFF BUILD BOOK 2006 TBSS way too much to list

02-27-2009, 05:12 PM	#6
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: where is the horn in my '78? what color is the lead that powers the horn? __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

02-27-2009, 05:39 PM	#8
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: where is the horn in my '78? okay thanks guys i found it. its not quite the shape i was looking for! now where is the horn relay hidden? __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

02-27-2009, 05:45 PM	#9
flamingbig10 6.0 powered square Join Date: Feb 2008 Location: Mesquite texas Posts: 3,459	Re: where is the horn in my '78? Its a few inches above or side of the fuse panel, don't remember since I have a universal wiring harness __________________ Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326 Last edited by flamingbig10; 02-27-2009 at 05:46 PM.

02-28-2009, 05:42 AM	#10
heavychevy79 Cheyenne Super Join Date: Nov 2008 Location: Dallas Texas Posts: 545	Re: where is the horn in my '78? Yeah it's above the fuse box. Most of the time it's the horn ring in the column, but I've had a few of those horns go bad on me too.

02-28-2009, 10:28 PM	#11
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: where is the horn in my '78? i still have power at the colum, i have tried to arc with a screwdriver but nothing, so i am hoping that it is the relay __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

03-02-2009, 04:33 AM	#12
heavychevy79 Cheyenne Super Join Date: Nov 2008 Location: Dallas Texas Posts: 545	Re: where is the horn in my '78? Put a test light on the horn wire and get someone to push the button. I'll bet the horn is bad.

03-02-2009, 04:43 PM	#13
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: where is the horn in my '78? thanks guys, after f*cking around for a few hours it turns out it was just the relay. d'oh! __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"



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