3rd Horn Issues

[WaterCruiser]

I have a dual-battery setup (with IBS)... just returned from a long trip to discover both batteries went flat, so after re-charging them I re-connect the primary battery and the horn immediately cycles on-off-on-off... Ok, I deserve that. So disconnect the wiring connectors to both horns mounted just behind the grill, same thing from a THIRD HORN (sounds like it's buried somewhere down in the engine bay. Pull the fuse in the engine room fuse box, same thing. Although I bought the car used it doesn't appear to have an aftermarket alarm setup - just the blinking red alarm LED on the center console. So, do any of my fellow 'Mudders know of another factory-installed alarm horn? Could it be tied in to the immobilizing system? How might I disable the horn so that I don't annoy my neighbors? I'm ready to tow it in for repairs. Thanks for any assist!

 

[Trunk Monkey]

Factory set up is just two horns, mounted behind the grill. I'd let it go off and see if you can't locate it.

 

[x8o8drifter]

I have a dual-battery setup (with IBS)... just returned from a long trip to discover both batteries went flat, so after re-charging them I re-connect the primary battery and the horn immediately cycles on-off-on-off... Ok, I deserve that. So disconnect the wiring connectors to both horns mounted just behind the grill, same thing from a THIRD HORN (sounds like it's buried somewhere down in the engine bay. Pull the fuse in the engine room fuse box, same thing. Although I bought the car used it doesn't appear to have an aftermarket alarm setup - just the blinking red alarm LED on the center console. So, do any of my fellow 'Mudders know of another factory-installed alarm horn? Could it be tied in to the immobilizing system? How might I disable the horn so that I don't annoy my neighbors? I'm ready to tow it in for repairs. Thanks for any assist!

What "LED"
Do you mean the security light next to the clock?
Just for clarification. If it is a totally separate LED it might actually be an aftermarket alarm.
If its the security light then IDK.
But yeah, do what trunk said. That then follow the wires.