[rdorman]

One of the things I struggle most with is wiring. I am wiring in some Hella horns and NEED HELP.

Looking at the wiring diagram for my car, it shows two wires. One is wire 21 black that runs from the fuse box to the front of the chassis (it says to horns). The other is black 18 that runs from the fuse box to the steering column (it says that this one goes to the (-) on the horn relay). The horn relay is marked terminals 30, to 12 volt; terminal 87 to the horns; terminal 85 to another 12 volt and terminal 86 to the horn button (one from finishline for dash mount) and then to ground I am assuming. 85 and 86 active the relay while 30 and 87 supply the power to the horns.

Question is, how to wire. Considering the physical location of all of this, what is the best way to connect what? Will a relay work if you connect power in reverse? For instance, if you apply power to 86 and ground 85 will that work?

Thanks
Rick