Hi,
I'm trying to run an air horn and the oem horn off a (on,off,on) switch -- Everything is wired up (including relay) / just wondering if anyone here knew if the oem horn "trigger" is a positive or negative lead? There are 2 wires leading to the horn one above and the other below -- I tried testing it, sometimes they both read 12v sometimes only one did, sometimes both read grd...I'm sure I'm doing something wrong -- haven't used a multimeter in some time...Thanks for any help!
--Marco in Boston
Far as I know the horn is wired to 12V. The horn switch closes the cirquit to ground.
Quote from: MarkusN on April 04, 2006, 06:02:56 AM
Far as I know the horn is wired to 12V. The horn switch closes the cirquit to ground.
I haven't dealt with horns in a LONG time, so I'm a bit rusty, but I believe ALL horns are wired like this... so your statement doesn't really help out too much.
The black wire is 12v from the ignition key switch. The black/blue wire is the ground side thru the horn button.
With the ignition key off both will be 0 v.
With the ignition key on both will be 12v (0 amp current flow).
With both the ignition key and horn button on, black will have 12v and black/blue will have 0v.
:cheers:
So it's a negative lead and it looks like i'll be using blk/blue into the other switch to toggle between both horns
Perfect! Thanks John
Thanks for the help guys