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Trying to figure out what’s up with my horn. Just bought the truck and don’t know much about it, but someone required the horn for some reason and I tried messing with it. Looks like the yellow wire is suppose to go to the horns, but it’s constant 12v and that’s not right. Any thoughts?
I have a 1986 with cruise on the steering wheel. I ran a wire from the yellow to the horn and it’s a constant on. Thinking maybe the horn relay is stuck or something? That’s why someone disconnected it and re wired it some weird way.
That relay lives in a good environment under the dash. Could the wiring in the steering column be messed up activating the relay all the time? That would be more likely. But all this is just guessing. First thing I would do is find the relay and pull it. If the relay clicks when you pull it, and then the yellow/green goes dead, then the relay was being activated all the time. To go much further than that you are going to need a testlight or voltmeter.
So unplugged the relay and the yellow wire is still hot, fuse is tested and is good. Ran hot straight to horns and they work also. But pressing the horn doesn’t even engage the relay. I’m confused
That same yellow wire comes from the relay. See if it's hot at the relay plug when the relay is unplugged. It's going to be hard to tell, but a yellow/lightblue feeds the relay plug and should be hot at all times. The yellow/lightgreen leaves the relay to feed the horns. If both yellow wires show power with the relay unplugged, you have a wiring problem on that yellow/lightgreen wire.
Yea the issue is the wire under the horn is solid yellow, no green or blue. I can’t see a yellow/green wire. But i looked at the relay and it seemed like 2 yellow/blue wires coming from the relay. But I’ll check again.
shouldn’t the relay click when u press the horn if power is getting sent to the relay?
The relay will only click when the darkblue on the relay is grounded. The darkblue is grounded inside the steering wheel.
The darkgreen and the darkblue stripes are going to be hard to tell apart. It is looking like you are connecting the horns to the wrong wire, it should have a stripe.
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