I keep reading about grounding the purple wire with yellow tracer out of the drivers door, but I also see mixed reviews on doing this to the 96-98 models. I found this, don't know if it applies to my year or not but I tried it and got squat.
A diagnostics mode is available in the system to
verify operation of all monitored switches or circuits.
To enter diagnostics, cycle the ignition key to the
accessory position 3 times, leaving the key in this
Upon entering diagnostics, the headlamps, park
and tail lamps will begin flashing to verify their
operation. In addition, the horn will sound twice.
Returning the ignition to the OFF position will stop
the lamps from flashing while keeping the system in
While in diagnostics mode, a horn pulse should
occur at each of the following events indicating proper
Note that vehicles equipped with the Vehicle Theft
Security System are also equipped with Illuminated
Entry. When in diagnostic mode it is recommended
that the Illuminated Entry Relay be removed. Otherwise
it is necessary to wait for the 30 seconds delay
after each door opening or closure.
(1) Beginning with all doors closed, open then close
each door. The horn will sound when the door jamb
switch closes, and then again when the switch opens.
There must be a 1 second delay between closing and
opening the switch.
(2) Open, then close the hood. The horn will sound
when the hood is opened, and again when it is closed.
(3) Activate the power door locks in both the Lock
and Unlock directions. The horn will sound after each
Z VEHICLE THEFT SECURITY SYSTEM 8Q - 1
(4) Rotate the key in each door lock cylinder to the
unlock position. The horn will sound as the switch
closes, and again when it opens. There must be a 1
second delay between changing switch states, or the
horn will not sound.
(5) Cycle the key to the ignition RUN position. A
single horn pulse will indicate proper operation of the
ignition input. This also will take the module out of
the diagnostics mode.
(6) Activate the Remote Keyless Entry in both the
Lock and Unlock directions. The horn will sound after
For any of these tests, if the switch does not remain
open or closed for at least 1 second, the horn will only
The lack of a horn pulse, during any operation,
- a switch failure
- the lack of that input to the Vehicle Theft Security
- or a failure internal to the module.
Check for continuity at the switch. If this is good,
check for an open or shorted wire between the switch
and alarm module. Also, check if the Powertrain Control
Module (PCM) has been replaced recently. For
the first 20 engine starts with a new PCM, the Vehicle
Theft Security System will function normally
except it will not prevent the engine from running.
A PCM from a vehicle equipped with Vehicle
Theft Security System cannot be used in a vehicle
that is not equipped with Vehicle Theft
If the Security Lamp comes on after ignition
ON and stays on, the CCD bus communication
with the PCM has been lost.