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12V Electronics

Is there a positive/negative on a 12 volt Horn?


This is a discussion on Is there a positive/negative on a 12 volt Horn? within the 12V Electronics forums, part of the TMC TRUCK & SUV category!
I am replacing the PITA horns on my '02 Silverado. Well ok just the drivers side high tone is the ...

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Old 03-08-2013, 12:59 AM
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Is there a positive/negative on a 12 volt Horn?

I am replacing the PITA horns on my '02 Silverado. Well ok just the drivers side high tone is the PITA.

The aftermarkets aren't OEM and they don't indicate on the horn or the install guide that one is (+) or (-) and both spades are the same size. On the factory it has a special plug which in no way can I re use on the new.

If there is a difference in the factory wiring which is which? It was late ,dark and I was tired. I'm pretty sure it wasn't read and black as I have YET to find any wires of that color unless I installed it.

If need be I'll start looking through the schematics but, I still have to finish re looming the driver's side and put the truck back together to go to work tomorrow night.

At least it'll be a sweltering 39 degrees when I wake up to finish my project tomorrow morn. Reminding me why I moved to sunny Florida.

So thanks in advance.
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Old 03-08-2013, 07:15 AM
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Yes, the OEM horn has positive and negative. Battery positive voltage is always applied to the horn relay coil and the horn relay switch. Hit the horn and the switch applies ground to the horn relay control circuit. The horns sound as long as ground is applied to the horn relay control circuit.

The positive wire is colored dark green
The ground is black

(If you are looking at the OEM connector with the release tab at 12 o'clock, the positive wire is the left pin and the ground is the right pin)


hope this helps a bit.
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Old 03-08-2013, 07:35 AM
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Thanks again Mike. You
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Old 03-08-2013, 01:37 PM
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Quote:
Originally Posted by bubbatrucklover View Post
Thanks again Mike. You

no problem
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