Posted by Rich'sToys on May 19, 2018 at 13:00:35 from (74.33.109.255):
I am wanting to add a horn to one of my old trucks which doesn't have one. I had all the components except for the horn relay, which I picked up on Ebay. Of course, instead of simply labeling the terminals so you can understand them (power, ground, switch, etc.) they instead have numbers on them--30, 85, 86, 87. And no instructions included! After doing some online searching I came up with what I thought was the correct sequence--30 to the power source, 87 to the horn itself, 86 through the horn button and then to ground, and 85 also to ground.
Well, today I got everything hooked up except the horn button. I thought I should be able to test it by grounding the 86 (horn button) terminal, but when I tried it, nothing happened. Any ideas as to what I might have done wrong? Or am I missing something else here?
I ran out of time to trouble shoot it any further today, but plan to in the next couple days.
Also, how heavy of a fuse should this have? Everything so far is wired with 12 gauge wire. I thought I might use 14 to the horn button.
The horn itself is good. It blows when I hook it up direct.
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