Real time interior screech

[devildogcruiser25]

So I was in the kitchen and hear a car horn go off. I went out and it was my car and I couldn't get the horn to stop for the life of me. Turned it on, drove it around, nothing. Parked it and pulled the horn fuse. Opened the cab and there was this horrible screech coming from the inside. Can't figure out how to get it to stop. Unplugged the battery for now. Sound will stop if ignition is engaged. Any ideas?

2000 LC
Factory alarm- blinks if car is unlocked. Can't recall if it always does that.
Not much else noteworthy I can think of.

 

[devildogcruiser25]

Anyone?

 

[Trunk Monkey]

Does it continue with the battery disconnected? Where in the truck/dash does it seem to be coming from. If you replace the horn fuse, what happens?

 

[Julian Stead]

Any chance of water ingress, whats the weather been like?

 

[devildogcruiser25]

Any chance of water ingress, whats the weather been like?

Been raining non stop for at least 48 hours

 

[devildogcruiser25]

Does it continue with the battery disconnected? Where in the truck/dash does it seem to be coming from. If you replace the horn fuse, what happens?

Does not continue with battery disconnected. Hard to tell where it's coming from... horn fuse is back, same issue inside

 

[Trunk Monkey]

Sounds like julian is on the right track if it's been raining that much, you might have a leak around the windshield. Check around the DS fuse block for any water.

 

[devildogcruiser25]

Sounds like julian is on the right track if it's been raining that much, you might have a leak around the windshield. Check around the DS fuse block for any water.

So just leaving the school. Been parked inside for a couple hours. Re connected battery, no sound. Checked fuse box inside drivers side, no sign of moisture anywhere.

 

[bjarnep]

Sounds like julian is on the right track if it's been raining that much, you might have a leak around the windshield. Check around the DS fuse block for any water.

+1. must be related to water - do check before it becomes expensive to fix.

 

[devildogcruiser25]

+1. must be related to water - do check before it becomes expensive to fix.

I've checked everything mentioned. Still getting the beeping. Sounds like it's coming from ignition console area. When key is on acc, I get sound but past that nothing.

 

[devildogcruiser25]

@nmatcek