Dodge Repair: 2003neon,alarm goes on, general purpose interface bus, remote keyless entry

Question
alarm goes on as if someone or thing is near it.It goes on anytime day or night,tried resetting ,But no .The alarm is hooked up to the horn,so you have to tap the horn lightly to try off alarm. Help

Answer
THIS BULLETIN IS BEING PROVIDED IN ADVANCE. DO NOT ORDER PARTS OR
PERFORM ANY ACTIONS RELATED TO THIS BULLETIN UNTIL MAY 9, 2003.
SUBJECT:
Inadvertent Siren Activation
OVERVIEW:
This bulletin involves replacing and configuring an Alarm Remote Keyless
Entry Module (ARKEM).
MODELS:
2002 (PG) PT Cruiser (International Markets)
2000 - 2003 (PL) NEON (International Markets)
2001 - 2003 (PT) PT Cruiser (International Markets)
NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A
THATCHAM ALARM, SALES CODE LSC.
SYMPTOM/CONDITION:
Customer may describe inadvertent siren activation or security alarm activates
for no apparent reason, can happen at any time.
DIAGNOSIS:
If this condition can be duplicated or customer describes this condition,
perform the Repair Procedure.
PARTS REQUIRED:
Qty. Part No. Description
1 04671880AC Module, Alarm Remote Keyless Entry
EQUIPMENT REQUIRED:
CH6000A Scan Tool (DRBIII®)
CH2002 General Purpose Interface Bus Cable Assembly
08-012-03 -2-
REPAIR PROCEDURE:
NOTE: AFTER INSTALLING A NEW ARKEM (RKE) MODULE IT MUST BE
CONFIGURED USING THE DRBIII® SCAN TOOL AS DESCRIBED BELOW. THE
DRBIII® SCAN TOOL MUST BE OPERATING AT LEVEL 56.0 OR HIGHER.
1. Replace the ARKEM (RKE) module as described in the appropriate service manual.
2. Hook up the DRBIII® Scan Tool to the Data Link Connector (DLC).
3. With the key in the ignition, turn the key to the RUN position.
4. After the DRBIII® Scan Tool initialization, perform the following:
a. Select “Theft Alarm”.
b. Select “VTSS”.
c. Select “Miscellaneous.
d. Select “Configure Module”.
e. Select “Yes” for Current Configuration Display.
f. Press Any Key.
g. Select the number of the model year of the vehicle (new requirement).
h. Select the number of the body style of the vehicle.
i. Select the number for Left Hand Drive or Right Hand Drive.
j. Select the number of the Market.
k. Select the Desired VTA (module) Type.
l. The Current Configuration is displayed.
m.Reprogram the RKE (Key Fob) Transmitter(s).
5. The configuration is complete, disconnect the DRBIII® Scan Tool