In this picture you have a voltage regulator at the top. Lower right from that is your fuse box. To the left of that is a common 3 pin horn relay. On that relay there should be marked somewhere H B and S. The H wire goes off to the horn. The B wire connects to battery (this wire is hot all the time...not through your ignition switch) and the S wire connects to your horn switch (the wire comes down from your steering wheel and exits on your steering column at the top (below the dashboard). Usually the top connection will be the horn, the middle connection will be the battery and the bottom connection will be the switch but please take a look at yours. If you have a handheld electronic tester, set it for DC and 12 volt or whatever DC setting will show you 12v. Then hold the black wire of it to a known good ground point and touch the red wire to the three connections. The one which registers on the tester will be the B connection. I hope this is helpful.
The ground connection is made when you attach this relay to the firewall...the screw going through the firewall makes it.
Last edited by Jon G; 06/07/2024 1:27 PM.
