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TR6 horn blows tr6

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Wike

Senior Member
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Installed new wiring harness on my tr6.

Hooked up battery cables and the horn blows. Each horn has two connection points for the horn wires and the other for ground...I'm assuming. All other instruments and gauges have not yet been hooked up. I feel this is a grounding issue and am thinking it may stop once all other gauges, lights, etc have been hooked up. Is this true or am I missing something?
 
Horns work through the relay... have you checked the relay connections? By the way hooking up the other gauges should not have any bearing on the horn.
 
And I would do this with the battery disconnected.
 
What year TR6? For 69, there was no relay and the horns were only grounded through the button (meaning the purple wire to the horns was hot all the time).

Since having the horns blow all the time is very annoying (to the neighbors even if you are deaf), I suggest disconnecting the wires at the horns, and connecting a test light or similar instead of one of the horns. When you get the light behaving properly, chances are the horns will work right too.
 
You might want to check the horn brush in the steering wheel hub. My GT6 used to randomly sound the horn before I replaced the horn brush.
 
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