Found this on the wrangler forum. According to the forum it is listed in the owners manual between pg 20 - 25 depending on year. Mine was through the EVIC so was pretty easy.
Sound Horn On Lock
This feature will cause the horn to chirp when the doors
are locked with the RKE transmitter. This feature can be
turned on or turned off. To change the current setting,
proceed as follows:
• For vehicles equipped with the EVIC, refer to “Electronic
Vehicle Information Center (EVIC)/Personal Settings
(Customer-Programmable Features)” in “Understanding
Your Instrument Panel” for further information.
• For vehicles not equipped with the EVIC, perform the
following steps:
1. Push the RKE transmitter LOCK button for 4 to 10
seconds.
2. While the LOCK button is pushed (after four seconds),
push the RKE transmitter PANIC button. Release both
buttons.
The “Sound Horn On Lock” feature can be reactivated by
repeating this procedure.
Sound Horn On Lock
This feature will cause the horn to chirp when the doors
are locked with the RKE transmitter. This feature can be
turned on or turned off. To change the current setting,
proceed as follows:
• For vehicles equipped with the EVIC, refer to “Electronic
Vehicle Information Center (EVIC)/Personal Settings
(Customer-Programmable Features)” in “Understanding
Your Instrument Panel” for further information.
• For vehicles not equipped with the EVIC, perform the
following steps:
1. Push the RKE transmitter LOCK button for 4 to 10
seconds.
2. While the LOCK button is pushed (after four seconds),
push the RKE transmitter PANIC button. Release both
buttons.
The “Sound Horn On Lock” feature can be reactivated by
repeating this procedure.
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