We have a 2008 Lexus RX350. We prefer the horn over beep to notify us the doors are locked. Can we change this or does the dealer have to do it?

 

Neither Lexus or you can do it. Here is a listing of the personalized settings that Lexus can change.

 

You could change it but it would require some wiring. There is a white wire in the drivers kick panel that you could tap into. It shows + when the beep activates so that wire would need it to run a relay to switch to a - input for the horn. The beep would in turn make the horn honk for both lock and unlock. But it would also make the horn honk when you open the power liftgate which would be two somewhat long honks. It would also honk the horn if you lock the car with a door open which would be a looooonnng honk!

 

For those that don't know the RX has two horns. One high pitched and one low pitched.

 

Horn diagram:

 

There is also a third security horn. It doesn't honk when you press the horn from the steering wheel. It only honks if the security alarm is going off. It is buried in the engine compartment and difficult for thieves to disable without actually opening the hood thus setting off the alarm.

 

Hi dear Jakenbake
can you lead me where is the third one (approx.),my car previous owners seems had a problem then he did new wiring as the old cars (steering PB - relay - horn(s) )
thanks bro
Firas