Re: Horn wiring?


[ Follow Ups ] [ Post Followup ] [ Dodge Power Wagon Forum ] [ FAQ ]

Posted by Gary on May 18, 1999 at 06:56:35:

In Reply to: Re: Horn wiring? posted by STP on May 17, 1999 at 21:21:21:

Sorry about the knuckle but isn't that the price for having such a nice truck?

Here's the scoop as far as I can tell from what you have told me.

First note that the way a horn works without a relay is that the horn button supplies
ground to the horn and the other wire on the horn is always hot (positive on a neg ground truck).
We have to switch that. The terminal which goes to the breaker points gets connected to the positive
contact on the horn and the other one on the horn (if there is one) should be grounded.

Then a positive lead from the battery (neg on positive grnd truck)
goes to the coil wire.

The horn button probably goes to the one in the center of the coil.

Now for the missing piece regarding those two contact points. As we know, one of them
goes to the terminal and will be connected to the horn. The other contact needs to be jumpered to the same
lead as the coil wire so that it also is supplied with power. Some relays have 4 terminals to facilitate this.

Here's how the thing works.

When the horn button is pressed, the ground is connected to the center of the coil completing the coil circuit.
This turns the coil into a magnet which pulls the breaker point down and into contact. That then supplies power to
the other point which is connected to the horn power side.

The reason for all this is to make remove the heavy current switching from the horn button and put it in a remote, heavy-duty
switch. With a high-powered horn and a direct hookup, you would burn out the horn switch very quickly.

Let me know if this works or if you need more info.

Gary


Follow Ups:



Post a Followup

Name:
E-Mail:

Subject:

Comments:

Optional Link URL:
Link Title:
Optional Image URL:


[ Follow Ups ] [ Post Followup ] [ Dodge Power Wagon Forum ] [ FAQ ]