Question about 2002 Chevrolet TrailBlazer

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2002 chevy trailblazer interior dome lights always on

Can disable them by the switch on the headlight switch module . Also the remote key function stopped working at this same time. Another symptom that may be related was that the liftgate unlock would intermittently not unlock until the unlock button was repushed on the interior control or the remote fob control

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  • Dan Frazier
    Dan Frazier Oct 13, 2012

    Here's more information. The liftgate does not lock. All the other doors lock with the driver door control. I checked the wiring between the body and liftgate. No problems there. I am thinking the liftgate lock may be the source. Will look in that area. Not sure if this would cause the RKE function to stop working also along with the interior lights being on constant (until the headlight switch disable switch is set )

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2 Answers

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  • Chevrolet Master
  • 1,311 Answers

The Liftgate Module does have something to do with the remote FOBs (it has the receiver for the FOBs) and could also have an effect on the courtesy lights, it senses an open liftgate and sends that info to the Body Control Module (BCM). An area of common problems are the wires in the rubber boot between the body and the liftgate, these wires need to be checked for breakage.

Posted on Oct 16, 2012

  • Dan Frazier
    Dan Frazier Oct 17, 2012

    Freddy, You were correct. I found that the small orange wire within that boot between the body and liftgate had previously been **** spliced in two places and one splice had failed, this cause the second 12 volt path to the LGM to open up. I fixed that wiring and all is back operational. Thanks for the information.

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  • 1 Answer

I too found that a small orange wire within the liftgate rubber boot that had broken. I spliced a new wire to the one broken end and fed it through the boot w a coat hanger wire and connected it to the other end of the orange wire. Problem fixed with no cost. I am stoked. Thanks.

Posted on May 09, 2014

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Posted on Jan 02, 2017

Anonymous

  • 1 Answer

SOURCE: 2002 Chevy Trailblazer's 4x4 control

I have a 2002 chevy trailblazer 4x4 control light not working. when trying to switch from 2wd to 4wd nothing happens. no ligth no engaging of the drive

Posted on Jan 28, 2009

Anonymous

  • 1392 Answers

SOURCE: have a 2002 chevy suburban, liftgate window will not open

Sounds like you have a wiring problem to your liftgate. Check the wires where they come out of the body, and go into the liftgate. If they are good, check fuses, or possibly a module.

Posted on May 25, 2009

chris22vw

  • 56 Answers

SOURCE: 2004 chevy siverado interior lights not working

If your problem is in all doors I'm probably wrong :)

But..you may find that an inner door jamb spring loaded switch has failed. It works exactly like the one in your fridge does, It triggers power to the light when the spring is out ,.. sometimes it gets stuck in you might just be able to clean and loosen it up.

Posted on Dec 07, 2009

jklisiewicz

  • 246 Answers

SOURCE: 2006 chevy trailblazer dome light will not turn off

it sounds as though you've got a wiring problem with your rear liftgate. this would cause the pin switch to think it's still open instead of closed, and the power loss to the wiper assembly. check your fuses first to see if there are any blown. then check and make sure your ground wire for the rear liftgate is clean and tight and not broken.

Posted on Feb 17, 2010

town41200

Emond Earl

  • 56 Answers

SOURCE: 2002 chevy trailblazer interior lights won't

sound like you might have a few problem interior light might be the door switch but the lock n unlock can be a fuse if they dont work in the truck or need to chance the battery in your remote

Posted on Nov 07, 2010

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1 Answer

Where is the bcm located on 2000 Buick lesabre


Your vehicle use's three module's that make up the body control system .
Body Control System Operation
Each of the 3 body control modules integrate a number of functional systems under the control of a single module. Each of the modules is connected to the Class 2 serial data line. Many control signals are implemented by Class 2 messages.
Dash Integration Module (DIM)
The DIM functions include the following functions:
• Power moding control (ignition switch states) over Class 2 serial data line
• Control of headlights and exterior lamps
• Interior lamps incandescent dimming
• Steering wheel controls
• Horn relay control for theft activation
• Lamps On signal with wiper/washer
• Low side temperature for HVAC compressor
• Cooling fan control (power - train cooling)
• Incandescent dimming of dash bulbs control
• Real time clock time keeper
• Battery voltage sense and load management
• Reverse lockout solenoid control
Instrument Panel Module (IPM)
The IPM functions include the following functions:
• Front HVAC air delivery and temperature controls
• Ambient light sensor input and twilight delay input for headlights control
• IP dimmer switch input
• Traction control switch input
• Interior lamps switch input
• Key in ignition switch input from the ignition switch
• Rear compartment lid release switch input
• Ignition switch headlight control
Rear Integration Module (RIM)
The RIM functions include the following functions:
• Heated seat controls
• Rear defogger control
• Park relay controls
• Various controls for the interior lamps
• Reverse control for the backup lamps
• Rear compartment lid release controls
• Retained Accessory Power (RAP) control
• Ajar switch and tamper switch inputs from the rear compartment lid
• Vehicle leveling
Your best bet , take your vehicle to a qualified repair shop , before you cause unnecessary problem's an repair's .

Jul 28, 2018 | Buick Cars & Trucks

1 Answer

My 2003 Navigator doors will only unlock with the key on


Sounds like a vehicle security module problem , but , without doing some testing that would be just a guess .
Checking for DTC'S - diagnostic trouble codes first ,then checking power an grounds to the module . Viewing wiring diagrams an testing electrical circuits for the locks too see if anything is wrong , missing power or grounds etc... Do you know what a wiring diagram is ? How to use a DVOM - digital volt ohm meter to test electrical circuits ? Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size. Under system click on body & accessories ,then under subsystem click on power locks . Click the search button then the blue link . If not familiar with automotive electronics your best bet mite be to take it to a qualified repair shop.

Power Lock
The power lock/unlock feature requests all of the vehicle doors, including the liftgate, be locked or unlocked upon a customer request from any interior door lock switch in the vehicle. The power door locking system functions independently of ignition status or vehicle speed. When the vehicle security module receives an unlock/lock command from any door lock control switch, the vehicle security module will activate relays internal to the module to supply the correct power and grounds for the door lock actuators.

Power Unlock Inhibit
NOTE: This feature is not enabled when the vehicle is delivered to the customer. If the customer requests this feature the module can be configured to enable this feature.
With the key in OFF, 20 seconds after electrically locked (remote transmitter, keypad, door lock control switch locked with door ajar) and all doors are closed, the door unlock switch will be inhibited if this feature is enabled. (The lock function will still operate.)
Deactivating/Activating Power Door Unlock Switch Inhibit
NOTE: The power door unlock switch inhibit feature needs to be enabled to perform this procedure.
This is customer configurable. Steps one through three must be completed within 30 seconds.
  1. Turn the key to ON, then press UNLOCK three times.
  1. Turn the key to OFF, then press UNLOCK three times.
  1. Turn the key to ON, within five seconds press LOCK two times.
The user should receive two horn chirps to indicate the system has been disabled or two chirps followed by a horn honk to indicate the system has been enabled.
Pressing LOCK two times again will toggle the door lock control switch inhibit feature state.
Turn the key to OFF to exit programming mode.
This feature can also be enabled/disabled using a diagnostic tool.
Auto-lock Enable/Disable - Using the Ignition Switch
Another way to turn the auto-lock feature off/on is by following this series of steps:
  1. Close all doors.
  1. Confirm that the key is in the OFF position.
  1. Turn the key from OFF to ON.
  1. NOTE: Steps 4 through 8 must be carried out within 30 seconds. Press UNLOCK three times.
  1. Turn the key from ON to OFF.
  1. Press UNLOCK three times.
  1. Turn the key from OFF to ON.
  1. Verify that the horn chirps. This indicates the enable/disable mode and now is ready to accept program changes.
  1. Press UNLOCK once to command the vehicle security module to toggle the auto-lock/relock feature OFF.
  1. Press LOCK once to enter the command.
  1. Verify that the horn chirps one time. There should only be one chirp indicating that the auto-lock/relock feature has been disabled. If one chirp is heard followed by a longer sound of the horn, the auto-lock/relock feature has just been enabled. Return to Step 10.
  1. Turn the key to the OFF position to exit the enable/disable mode.
  1. Exit the vehicle and verify that the horn chirps once to indicate that a feature has been changed and that auto-lock/relock has been disabled.

Apr 05, 2018 | Cars & Trucks

2 Answers

The red light that is located on the little antenna attached to the windshield formy remote car starter stays on and the remote will not start the car


I don't know anything about remote car starters, but you might want to see if it has a reset button, or try changing the battery.

Feb 02, 2015 | 1998 Chevrolet Blazer

1 Answer

ML 320 Remote Control doesn't function


Have you tried replacing the battery in it?

Jan 16, 2015 | 2001 Mercedes-Benz ML 320

1 Answer

2003 malibu alarm won't stop


Well when you replaced the battery did anything else on the key fob work? Often times you have to reprogram the remote in order for it to function properly. Try getting inside the vehicle and manually lock all doors with the driver's side switch. Put the master key in the ignition switch and turn the switch to the run position but do not start it. Now push and hold the lock and unlock buttons at the same time until the locks make noise....may take 10 to 30 seconds. After you have the key fob programmed, see if the alarm will turn off with the remote. Did it work? The only way to totally turn off the alarm is with a GM Tech @ or 3 scan tool and go into body control bidirectional controlling procedures or with a very good aftermarket scanner with good bi-directional functionality.
The alarm works via the body control module on this vehicle and i am thinking it uses the PK2 system and if you do not have a properly coded key or the BCM is loosing memory, then check for any and every blown fuse and replace as needed.to start with.. If the vehicle stays running after starting then the bcm/key is reading correctly.

Jan 21, 2018 | 2003 Chevrolet Malibu

1 Answer

HOW DO YOU FIX THE ALERO ANTI THEFT PROBLEM IF IT KEEPS COMIING ON


I am assuming the light you are talking about is the "SECURITY" light on the dash. Your Alero is equipped with GM's Passlock system which cuts fuel to your engine if it determines that a source other than the key is trying to start the car.

I found this online, i posted it somewhere else as well and heard it would work...goodluck

PASSLOCK I or II DISABLEMENT
The following is a procedure to disable Passlock I or II Systems for vehicles in which remote start/stop system installations are required. This procedure is required because a remote start system will not function with the current Theft Deterrent System (Passlock) which is included on many 1996 and up GM vehicles.

Please note that this modification is intended to be used only in conjunction with the installation of a remote start/stop system and does not provide a procedure to install a remote start/stop system.

CAUSE
If an attempt is made to start a vehicle by a means other than a key rotation in the ignition switch, the Body Control Module (BCM) will interpret this start as a vehicle theft and disable the fuel injectors.

CORRECTION
A minor wiring modification may be made to allow the vehicle to be started remotely. This modification includes adding a switch to allow the customer to select "ON" to disable Passlock or "OFF" for normal Passlock operation.

CAUTION: When this modification is performed and the switch is set to the ON position, the theft deterrent feature will be disabled. When the theft deterrent is disabled the SECURITY or THEFT telltale will light up indicating that the theft deterrent system is NOT functioning.

PASSLOCK MODIFICATION
Refer to appropriate GM service manuals and/or SVMQP Electrical Guideline Manual for instruction on splicing and electrical connections.
1. Select a suitable on-off switch (see note below) which will be used to disable/enable the Passlock System. Mount the switch in a location such that it is accessible to the driver and will not interfere with normal vehicle operation.
NOTE: This is an extremely low current circuit (approx. 7mA), it is therefore very important that a high quality, low energy, fast acting switch be utilized for this application.
2. Turn the ignition switch to the OFF position.
3. Locate the Main Ignition Switch Harness in the Column. GM's Passlock System wires exit the Ignition Switch Tumbler together and then join with the Main Ignition Switch Harness. (See http://www.bulldogsecurity.com/ or http://64.85.6.118/diagrams/diagrams.asp and select your Make, Model and Year for wire colors and clues on the quickest way to access these wires.)
4. Locate the Yellow Passlock Data Wire which is included in a bundle of three tiny (20 GA) wires wrapped in friction tape.
Cut this wire and splice a 0.5mm2 (20 GA) yellow wire to each end of the cut wire.
Keep wire length to a minimum. Route modification wires clear of moving parts.
Connect the yellow wires to the switch such that the contacts are OPEN when the switch is in the ON position.
5. Turn modification switch to the OFF postion (contacts closed).
6. Start vehicle to verify normal operation. If engine "cranks but will not start" recheck the switch position (contacts should be closed), wire connectors and modification wiring.

SWITCH OPERATION
To enable remote start:
Start the engine with the ignition key (modification switch must be in the OFF position). Turn modification switch to the ON position (contacts open). The SECURITY or THEFT telltale will light up indicating that the Passlock System is inoperative.Once the SECURITY or THEFT telltale has been on for at least 5 seconds the vehicle can be turned off and then remotely started.

To disable remote start:
The Passlock System can be reactivated by turning the modification switch OFF (contacts closed). Vehicle can either be running or off when this is done.

Please note that the VCM/PCM will record Diagnostic Trouble Codes (DTCs) related to the security system when the modification switch is in the ON position (circuit open). This is due to the way that the VCM/PCM interprets this condition.

NOTICE
Any condition which removes battery power from the Vehicle Control Module/Powertrain Control Module (VCM/PCM) (e.g. dead battery, disconnected harness connectors, etc.) will prevent the vehicle from being restarted. If the engine exhibits a "cranks but will not start" symptom, place the modification switch in the OFF (contacts closed) position. This will reactivate the Passlock System and allow the vehicle to be started with the ignition key.

Hope helps (remember to rate and comment this).

Sep 22, 2010 | 2002 Oldsmobile Alero

1 Answer

Car wont start reads pass key fault


Passlock I reset.

1. Attempt to start the car, let it stall, but DO NOT turn the key off! Leave it in RUN.
2. Wait 10 minutes or until the Theft Sys light glows steady instead of blinking.
3. Do not turn the key off, but start it immediately.
4. This should reset your Passlock system.




PASSLOCK I or II DISABLEMENT

The following is a procedure to disable Passlock I or II Systems for vehicles
in which remote start/stop system installations are required. This procedure
is required because a remote start system will not function with the current
Theft Deterrent System (Passlock) which is included on many 1996 and up GM
vehicles.

Please note that this modification is intended to be used only in conjunction
with the installation of a remote start/stop system and does not provide a
procedure to install a remote start/stop system.

CAUSE
If an attempt is made to start a vehicle by a means other than a key rotation
in the ignition switch, the Body Control Module (BCM) will interpret this
start as a vehicle theft and disable the fuel injectors.

CORRECTION
A minor wiring modification may be made to allow the vehicle to be started
remotely. This modification includes adding a switch to allow the customer to
select ?ON? to allow remote starting or ?OFF? for normal Passlock operation.

CAUTION: When this modification is performed and the switch is set to the ON
position, the theft deterrent feature will be disabled. When the theft
deterrent is disabled the SECURITY/THEFT SYSTEM telltale will light up
indicating that the theft deterrent system is NOT functioning.

PASSLOCK MODIFICATION
Refer to appropriate GM service manuals and/or SVMQP Electrical Guideline
Manual for instruction on splicing and electrical connections.
1. Select a suitable on-off switch (see note below) which will be used to
disable/
enable the Passlock System. Mount the switch in a location such that it is
accessible to the driver and will not interfere with normal vehicle operation.


NOTE: This is an extremely low current circuit (approx. 7mA), it is therefore
very important that a high quality, low energy, fast acting switch be
utilized for this application.
2. Turn the ignition switch to the OFF position.
3. Locate the Main Ignition Switch Harness in the Column. GM's Passlock
System wires exit the Ignition Switch Tumbler together and then join with the
Main Ignition Switch Harness. (See http://www.bulldogsecurity.com/ or
http://64.85.6.118/diagrams/diagrams.asp and select your Make, Model and
Year for wire colors and clues on the quickest way to access these wires.)
4. Locate the Yellow Passlock Data Wire which is included in a bundle of
three tiny (20 GA) wires wrapped in friction tape.
Cut this wire and splice a 0.5mm2 (20 GA) yellow wire to each end of the cut
wire.
Keep wire length to a minimum. Route modification wires clear of moving parts.


Connect the yellow wires to the switch such that the contacts are OPEN when
the switch is in the ON position.
5. Turn modification switch to the OFF postion (contacts closed).
6. Start vehicle to verify normal operation. If engine ?cranks but will not
start"
recheck the switch position (contacts should be closed), wire connectors and
modification wiring.

SWITCH OPERATION

To enable remote start:
Start the engine with the ignition key (modification switch must be in the
OFF
position). Turn modification switch to the ON position (contacts open). The
SECURITY/THEFT SYSTEM Telltale will light up indicating that the Passlock
System is inoperative.
Once the SECURITY/THEFT SYSTEM telltale has been on for at least 5 seconds
the vehicle can be turned off and then remotely started.

To disable remote start:
The Passlock System can be reactivated by turning the modification switch OFF
(contacts closed). Vehicle can either be running or off when this is done.

Please note that the VCM/PCM will record Diagnostic Trouble Codes (DTCs)
related to the security system when the modification switch is in the ON
position (circuit open). This is due to the way that the VCM/PCM interprets
this condition.

NOTICE
Any condition which removes battery power from the Vehicle Control
Module/Powertrain Control Module (VCM/PCM) (e.g. dead battery, disconnected
harness connectors, etc.) will prevent the vehicle from being restarted. If
the engine exhibits a ?cranks but will not start? symptom, place the
modification switch in the OFF (contacts closed) position. This will
reactivate the Passlock System and allow the vehicle to be started with the
ignition key




Dec 12, 2009 | 1995 Chevrolet Caprice Classic

1 Answer

No low beam, headlight on warning sounds w/lights on auto with key out


Had the same problem on a 2003 vibe- finally dianosed as a fried headlamp module then needing to trace back and find a short in the electrical that blew headlamp module . Module $ 170. Labor to replace module 2hrs. Labor to trace short 4 hrs??? Dealer charged me $900- .
If anyone has info on how much time it should have taken. I would appreciate the feedback

Oct 21, 2008 | 2005 Pontiac Vibe

2 Answers

1997 Chevrolet Headlight problem


did you try removing the DRL fuse to disable the daytime running lights, and double check your bulbs and fuses for the regular headlights? I'm not much of a mechanic but I'll take that fuse box before messing with anything else.

Aug 07, 2008 | 1997 Chevrolet S-10 Pickup

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