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Discussion Starter #1
Looks like my 67 GTO has had some creative wiring along the way. Horn relay power lead connects to alternator and provides only 1-2 volts output to relay, 3-4 volts after starting. I have seen a diagram which indicates power comes from a junction box. Can anyone tell me which one and where it is located, what it looks like? Thanks!
 

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Hi. I have a 67 Goat as well. I believe mine goes thru the firewall, thru one of the 2 plugs on the drivers side of the eng compt. Pretty sure it goes to the rear of the fuse panel.
not 100% sure
good luck
 

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Discussion Starter #3
That's the green trigger wire that goes from the horn button to the relay. Fortunately, I know that works because the relay clicks. But there is not enough current to engage the horns. So that has to be a power source problem, I think. Somebody let me know if I'm off base here. Thanks.
 

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3 wires involved. 1 green= trigger for relay, from firewall/fuse panel. 2 black = power to the horns, from the relay. 3 brown = power into the relay, from the fusable link (alternator). The horns MUST also have a very good ground to the vertical brace...what goes in (+) ...must come out (-). Eric :cheers
 
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