The horn wiring circuit is not in the service manuals. . .and I'm trying to hook an aftermarket horn up on my '94 YJ. . .should be really straight forward except for the air compressor for the horn doesn't get enough power using the OEM hook-up (ground and switched 12V+). . .so I have to hook it up to the YJ using the relay that came with the horn. . .but I don't want a second horn switch. . .I want to use the stock horn switch.
I'm supposed to hook the compressor negative to chassis ground (done), hook the compressor positive up to relay post #87 (done), hook relay post #86 to relay post #30 along with running a wire from post #30 to the battery with an inline 20A fuse, and finally hook relay post #85 to the provided horn switch. . .and then ground the horn switch
. . .so if I wanna hook this up to my stock horn switch what do I need to do??? I know that the stock horn uses a 10A fuse located in the power distribution center behind the battery. . .other than that I'm not sure because I don't have a wiring diagram of what is going on. . .
. . .does the stock horn switch have a separate ground like the aftermarket switch or does it use the gound that the OEM horn uses. . .if it uses a separate ground then I'm good there and I can keep it that way. . .which would lead me to believe that I could hook the OEM 12V wire from the horn up to Relay post #85 and either run a wire to the battery with the inline 20A fuse or I just need to replace the stock OEM 10A fuse with a 20A and all should be good. . .right?