Horn Troubleshooting
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
1.. Fuse check (Stop/Hazard fuse I think)
2.. Unplug the horn(s) and stick a test light into the plug, ground to something good and press the horn button to determine if it's the horn or something else (I'd also use a set of jumper wires to test the horn its self with another battery...)
3.. Check for power coming out of the horn relay (green?) when you press the button
4.. If nothing is coming out the relay, check to make sure it's getting ground when you press the button (horn button grounds, power is there all the time)
5.. pull the horn button and use a piece of wire or screwdriver to short the horn ring to ground and see if that does anything.
5.. pull the harmonica connector and short the horn connection to ground to see if it's in the column or between the column and the horn
6.. gets complicated after that...
M
2.. Unplug the horn(s) and stick a test light into the plug, ground to something good and press the horn button to determine if it's the horn or something else (I'd also use a set of jumper wires to test the horn its self with another battery...)
3.. Check for power coming out of the horn relay (green?) when you press the button
4.. If nothing is coming out the relay, check to make sure it's getting ground when you press the button (horn button grounds, power is there all the time)
5.. pull the horn button and use a piece of wire or screwdriver to short the horn ring to ground and see if that does anything.
5.. pull the harmonica connector and short the horn connection to ground to see if it's in the column or between the column and the horn
6.. gets complicated after that...
M
Safety Car
Joined: Dec 2012
Posts: 3,816
Likes: 1,727
From: Summerville SC
Sometimes these things die. They get water in them and pieces rust up. Then the little diaphram can't move. If you have power as required (and ground) then take it apart and check out the insides.
Race Director
Joined: Nov 2006
Posts: 13,234
Likes: 7,827
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
The most common thing to fail is the horns themselves. I've gone through 3 sets of them. This last time, about 10 years ago I got a pair of Holden horns that where made in Spain of all places. And they are still working!
And they look, and sound the part!
And they look, and sound the part!
Team Owner
Joined: Jun 2001
Posts: 43,136
Likes: 155
From: Thomson Georgia
