Standard horn wires

[young-saxo]

there are two wires going to my standard horn on my saxo
does any body know which is pos and which is neg.
as i am looking to wire air horns to my car

[COOP]

Just Wire Them Any Way And If The Air Horn Motor Is Sucking Insted Of Blowing Then Just Turn Wires Round

[Lozza_vtr]

Its should be green/yellow which is - and the other cable should be beige or white which is +.

[Joesnow]

Just a thought… haven’t actually looked on my saxo but its usually uncommon for there to be a negative wire as the chassis is negative… could be possible that they are both positive? Just have a play about… you’ll soon realise which is the right way round…

[young-saxo]

well on the instructions it gives me two wiring options
depnds if my horn button is connected to positive or my horn is a grounded horn buton? :S:S:S

any suggestions.

[Coonper]

Dont wire it up to your existing horn! It will fail MOT's!
Wire up your air horns on their own circuit, thats what i did! Just have a small flick switch on the dash to operate it! Whats more, it looks cool having a toggle switch on your dash!:y:

[sparky771]

dont it only fail if they are more than one tone?