Horn Fails To Sound With Alarm Tripped

WARNING: This page is about a different car, the 2002 Dodge Intrepid, 2002 Chrysler Intrepid, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Possible Causes:

Check Horn Operation
Junction Block - Open Horn Relay Control Circuit
Body Control Module - Open Horn Relay Control Circuit

Testing

Press horn pad on steering wheel. If horn operates properly, go to next step. If horn does not operate properly, repair horn as necessary. See STEERING COLUMN SWITCHES - CONCORDE, INTREPID & 300M article.
Turn ignition off. Remove Body Control Module (BCM) from back of junction block. Connect a 12-volt test light between battery voltage and terminal No. 18 at BCM connector on back of junction block. See Figure and Figure . Press horn pad on steering wheel. If test light illuminates when horn pad is pressed, replace BCM. See BODY CONTROL MODULE under REMOVAL & INSTALLATION. If test light does not illuminate when horn pad is pressed, replace junction block. See JUNCTION BLOCK under REMOVAL & INSTALLATION.