DL650A horn wiring?

[SHOVEL76]

Info needed as my minds gone totally blank!
Should horn wiring have a constant live to it?
I've been adding lights and now a Denali soundbomb, but confused by the constant live.
any help or ridiculing would be a great help..
Thanks

[sjrainsford]

A horn is normally on a  switched 12V supply (so live when you press the button).  They have a permanent earth or negative connection via their body.

[Ianmc]

   Yes,the horn has a permanent 12volt pos.supply when the ignition is ON.When you press the horn button it earths the horn,that's why you have to be careful if you add a relay to power better horns.Well it is on my L2.

[Gert]

Since you are installing a Denali soundbomb, I suggest if not yet done so, that you consider wiring up the new horn via a relay as shown in the diagram of https://www.v-strom.co.uk/smf/index.php?topic=21326.0

The OE horn wiring, fuse ampre and the horn activating button may be too light to carry the load of the new horn, hence the relay.

[sjrainsford]

Apologies yes, have just looked and they are two wire with permanent positive feed.  The negative is switched on and off using the switch.

[Pete O Tube]

ianmc and sjrainsford - that's an odd one regarding a permanent live to the horn, I looked on the 1000K4 Haynes wiring diagram and that's definitely a switched live but the gen 2 650 Haynes wiring diagram shows a switched negative (permanent +12V to the horn with the ignition on).