Is horn button wired to positive or negative

[seanarthurmachado]

Hi everyone,


I am about to try to install an air horn on my old 79 gs850g.

(I purchased a chinese made "electric horn machine" off of ebay a month ago or so, it claims to be a "nautilus" model....is unbranded and apparently a knock off.)

To wire it up, there are two vague diagrams on the back, one for a horn wired to the "horn button" as a positive to the horn, and one as a horn wired as a negative.

I sort of recall a posting that the gs is wired as a negative but a search could not find it during a search.


can anyone confirm ?


Thanks

Sean

[tom203]

When ignition is "on" positive power is supplied to horn, pushing the horn button grounds out the horn to complete circuit and beep beep. Are you going to use a relay? Might want to test to determine current draw of this chinese unit.

[JTGS850GL]

The horn button supplies the ground. Orange/Green wire is the hot and the green wire is the switched ground.

[seanarthurmachado]

When ignition is "on" positive power is supplied to horn, pushing the horn button grounds out the horn to complete circuit and beep beep. Are you going to use a relay? Might want to test to determine current draw of this chinese unit.

Yes. It comes with a relay and wires from relay to horn, so I'm going to connect (per instructions) to battery.

Sean

[Datsa Noydb]

Does your new horn have one terminal or two?

If it has two (like the stock horn), you will be just fine.

If it has just one, you will need to install a relay.

[WolfworksCustoms]

Ya gotta use a relay in between....i tried puttin a 72 Chevy truck horn in my Kawi, and it kept blowin the main fuse.....once my buddy installed the relay, all was fine.....

[seanarthurmachado]

The new horn has 2 connectors, and the instructions suggest connecting directly to the battery for power and using a 30 amp fuse in line, and connecting the relay to the original wires and a 3rd wire to power

sean

[Datsa Noydb]

If your horn has two connectors, you could just put in in place of the stock horn, but you would probably get better sound if you use a relay.

One of your horn's connectors will be 'hot', the other will be 'ground'. Same with your stock horn wiring, except the 'ground' connector is only grounded when the button is pressed.

If you wish to use a relay, connec the relay's pin #30 to the battery (with a fuse, but probably doesn't have to be 30 amps), #85 and #86 to the stock horn connectors (does not really matter which one goes where) and #87 to your horn's 'hot' connector. Connect your horn's 'ground' connector to a chassis ground.

[Guest]

Yes install a relay.