67 Horn problems

[Henry S.]

I posted awhile back about my horns quitting but didn't/haven't had a chance until now to check them out. They were rebuilt about a year and half ago by Hornworks so I don't think it's the horns themselves. Checked the fuse and it's good. Also took off the horn button and all seems to be fine inside there. Any ideas how or where to start? Thanks for the suggestions. Shooter

[Rich P.]

Re: 67 Horn problems

Henry,

when you press the horn button you should hear the horn relay "Clicking" if the circut is working properly up to there. If not it could be the relay or somethig from there back to the horn button.
Also you need to check that you have good grounds from the horn bolts to the horns and then to the radiator support.

Rich

[Henry S.]

Re: 67 Horn problems

Henry,

when you press the horn button you should hear the horn relay "Clicking" if the circut is working properly up to there. If not it could be the relay or somethig from there back to the horn button.
Also you need to check that you have good grounds from the horn bolts to the horns and then to the radiator support.

Rich

Thanks Rich, I'll check for the clicking. If I remember right, I don't hear anything at all, but I'll check again. I remember when I put the horns back on making sure there was bare metal under the star washer to make contact, but I'll check that also. Thanks, Henry

[Henry S.]

Re: 67 Horn problems

No clicking or anything when I press the button Rich, so tomorrow I'll start at the button work my way forward. Thanks.

[Ara G.]

Re: 67 Horn problems

Henry, am going through similar, but not identical problem with my car. If no clicking, make sure the ground to the horn relay is good. If the radiator support was painted, there might not be a good ground to the relay. You may also want to bench test the horns. I just did on mine and they are shot. That was a quick and easy way to immediately diagnose the problem. If the horns are shot, you may spend a lot of wasted time diagnosing the issue and it may turn out to be bad horns. Rust forms in the horns quicker than one thinks. Good luck. ARA

[Henry S.]

Re: 67 Horn problems

Henry, am going through similar, but not identical problem with my car. If no clicking, make sure the ground to the horn relay is good. If the radiator support was painted, there might not be a good ground to the relay. You may also want to bench test the horns. I just did on mine and they are shot. That was a quick and easy way to immediately diagnose the problem. If the horns are shot, you may spend a lot of wasted time diagnosing the issue and it may turn out to be bad horns. Rust forms in the horns quicker than one thinks. Good luck. ARA

Thanks Ara, I'll do a bench test today to make sure the horns still work. I did take the realy off and cleaned the contacts and made sure it was making contact with ground. The weather here in Central Illinois make us one of the leaders in the "rust market"!!

[Stephen L.]

Re: 67 Horn problems

Henry, Just take a jumper wire and clip it between the + pole on the battery and the tab (green wire) on the horn. If horn doesn't sound then ground or horn is suspect. Both horns failing simultaneously is quite odd.....

Then work backward from that point with jumper to the relay output.
Is relay connected properly? Ground wire connection is "deceiving" at the relay.

Relay operation can be tested by jumpering horn button input point to ground. check your wiring diagram for wire colors.

[Henry S.]

Re: 67 Horn problems

Henry, Just take a jumper wire and clip it between the + pole on the battery and the tab (green wire) on the horn. If horn doesn't sound then ground or horn is suspect. Both horns failing simultaneously is quite odd.....

Then work backward from that point with jumper to the relay output.
Is relay connected properly? Ground wire connection is "deceiving" at the relay.

Relay operation can be tested by jumpering horn button input point to ground. check your wiring diagram for wire colors.

Tried the hot wire to horns, they work. Checked out the 67wiring diagram for relay and the connectors look different than what I have. First off my relay is a 824 instead of a 837 however it worked for the 2 years I had it up until now. Anyway from the wiring diagram it looks like there is one connector (2 wires) connecting to the 2 spades on the underside of relay. Mine has 2 separate connectors. I have the two wires (one orange/red and the other black) that fit under the screws on the side. I also have a wire coming out of harness with a circle connector(ground) that was on the bolt attaching the relay to radiator support. In the Assembly Manual G246 UPC 12, A7 it doesn't show a ground wire on the bolt in View A. Also it shows the relay connector I was referring to. I do have juice to the relay. I fogot to check the relay output Stephen when i saw the wiring diagram I got sidetracked. I'll check that tomorrow.