05-10-2017, 10:51 AM
(This post was last modified: 05-10-2017, 10:59 AM by Reckless Rat.)
(03-10-2017, 07:35 PM)Graham Honnor Wrote: Good evening All
My horn arrived today and I wondered if I might trouble any of you with a couple of questions please.
The instructions show the horn being wired through a relay and I wondered if this is the method
that should be adopted. Also, my wiring is positive earth so I wondered which side of the horn should be
grounded, the + or - side please?
Many thanks
Graham.
Hello Graham.
The horn on my RP saloon operates through a feed from the +ve battery terminal (fused) which then runs to ground via the -ve terminal when the horn button is pressed. My car is negative earth. There is no relay. Assuming your car is positive earth then the set up should still conform to the horn's polarity which in your case the positive terminal on the horn should be connected to the horn button and the negative terminal to battery via an in line fuse (if you've got one). You can of course add in a relay if you want to but the original set up using the Rist doesn't use one and seems to work OK.
Before connecting it all up however, run a couple of wires from your battery and test operation across the klaxon's terminals just to be sure. The klaxon operates by virtue of a motor which has to turn in the correct direction for it to work properly.