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Anonymous Posted on Jan 04, 2011

My rear hatch door does not unlock, my keyless entry does not work, my rear windsheild wiper does not operate, and my power seats and heated seats do not work. I replaced the power seat relay, is there a "master" type relay/fuse that controls all of that?

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Ryan Lutton

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  • GMC Master 1,267 Answers
  • Posted on Jan 04, 2011
Ryan Lutton
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As far as the hatch and the wiper in the rear: 1 common problem is the wiring at the top at the hatch. Due to the poor wiring layout here, this flexes quite a bit with opening and closing the hatch. These wires will tend to rub against the metal and short out. Check this out first, it's a cheap fix.

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2000 Mountaineer long delay on remote door unlock. To unlock the doors I have to hold the key fob unlock button as long as 10 seconds efore the door unlocks. No idea the cause.

Time for a new key fob ? Does it work good for locking the doors ?
Module Controlled Functions The multifunction modules consist of the following:
  • generic electronic module (GEM)/central timer module (CTM)
  • remote anti-theft personality (RAP) module (15K602)
The remote anti-theft personality (RAP) module controls the keyless entry, and computer operated locks systems.
The GEM/CTM controls the following features:
  • wiper/washer (front/rear)
  • warning chime
  • battery saver
  • illuminated entry and courtesy lamps
  • driver one touch down power window (GEM only)
  • accessory delay
  • 4 wheel drive (GEM only)
  • For keyless entry concerns, refer to Section 501-14B .
  • Keyless Entry The keyless entry system components consist of the following:
    • keyless entry remote transmitter (15K601)
    • remote anti-theft personality (RAP) module (15K602)
    • driver unlock relay (if equipped with two step unlocking)
    • all unlock relay
    • all lock relay
    • keyless entry keypad (14A626)
    The electronic door lock system has three main components: the remote anti-theft personality (RAP) module, attached to the rear left hand quarter panel, the three-button (hand held) keyless entry remote transmitter (15K601), and the keyless entry keypad (14A626) on the driver side door.
    The door locks are controlled by the RAP module through three external relays: the driver unlock relay (if equipped with two step unlocking), the all unlock relay, and the all lock relay. These relays are located in the relay box on the LH rear quarter panel.
    The keyless entry remote transmitter initiates the following electronic door lock system functions:
    • Unlocks the driver door (if equipped with two step unlocking).
    • Unlocks all doors.
    • Locks all doors.
    • Enables the panic alarm.
    • Issues the interior lamps on (when unlocking) and off (when locking) commands to the generic electronic module (GEM).
    • Sounds the horn (13832) once when LOCK on keyless entry remote transmitter is pressed twice, and doors are closed.
    • Sounds the horn twice when LOCK on the keyless entry remote transmitter is pressed twice, and any door or the liftgate window is ajar.
    • Allows up to four keyless entry remote transmitters to be programmed.
    • The order that the transmitters are programmed into the module will set the memory seat to the corresponding position when the driver door is unlocked with the transmitter.
    NOTE: The remote entry features will not function when the ignition switch (11572) is in the RUN or ACC position.
    The keyless entry remote transmitters are reprogrammable and must be set at the same time.
    To confirm that the doors have been locked and that the anti-theft system has armed, press the LOCK button again, within five seconds of the first press. The horn will sound once if the doors have locked and all doors are closed.
  • Inspection and Verification
    1. Verify the customer concern by operating the electronic door lock control system.
    1. Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart:

      Visual Inspection Chart Mechanical Electrical
      • Binding latches
      • Fuse(s) 20 (7.5A), 9 (20A), 18 (10A), 1 (60A), and 25 (7.5A)
      • Relays
      • Wiring harness
      • Loose or corroded connections
      • Keyless entry keypad
      • Remote transmitter
      • Door open warning lamp switch
    1. If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If scan tool does not communicate with the vehicle:
      • check that the program card is properly installed.
      • check the connections to the vehicle.
      • check the ignition switch position.
    1. If scan tool still does not communicate with the vehicle, refer to the scan tool manual.
    1. Perform the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with:
      • CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00 .
      • NO RESP/NOT EQUIP for RAP, go to Pinpoint Test A.
      • NO RESP/NOT EQUIP for GEM/CTM, go to Pinpoint Test G.
      • SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and perform self-test diagnostics for the RAP.
    1. If the DTCs retrieved are related to the concern, go to RAP Diagnostic Trouble Code (DTC) Index or GEM/CTM Diagnostic Trouble Code (DTC) Index to continue diagnostics.
    1. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Taking your vehicle to a qualified repair shop mite be your best bet , one that has a scanner that can read these code
    2. RAP Module Diagnostic Trouble Code (DTC) Index
      RAP Module Diagnostic Trouble Code (DTC) Index DTC Description DTC Caused By Action B1309 Power Door Lock Circuit Short to Ground RAP GO to Pinpoint Test C . B1341 Power Door Unlock Circuit Short to Ground RAP GO to Pinpoint Test C . B1485 Brake Pedal Input Circuit Short to Battery RAP GO to Pinpoint Test D . B1526 Keyless Entry Keypad Switch Circuit Short to Ground RAP GO to Pinpoint Test B . B1629 PRNDL Reverse Input Short to Battery RAP GO to Pinpoint Test E . B1845 Ignition Tamper Circuit Failure RAP Invalid DTC. Ignore this DTC. B2425 Keyless Entry Out of Synchronization RAP GO to Pinpoint Test C . B1334 Decklid Ajar Rear Door Circuit Short to Ground RAP REFER to Section 417-02 .
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I had my passenger headlight bulb replaced. Now when I go to start my 2009 buick lacrosse, my horn honks, wipers come on, trunk pops open and loud bass static on my radio.

Who replaced the headlamp bulb ? Take it back . Everything your having problems with are all controlled by the BCM - body control module . May have crossed wire's ,shorted etc....
This vehicles BCM functions as the Power Mode Master (PMM). Refer to Power Mode Description and Operation for a complete description of the power mode functions.
Body Control Module
The various body control module (BCM) input and output circuits are described in the corresponding functional areas indicated on the BCM electrical schematics. The BCM functions include the following:
• Battery rundown protection--Inadvertent power--Refer to Interior Lighting Systems Description and Operation .
• BTSI/automatic transmission shift lock control--Refer to Automatic Transmission Shift Lock Control Description and Operation .
• Bulb check--Refer to Instrument Cluster Description and Operation .
• Chimes--Refer to Audible Warnings Description and Operation .
- Check gages
- Content theft deterrent
- Door ajar warning
- Headlamps ON
- Key-in-ignition
- Oil reset
- Park brake warning
- Seat belt not fastened
- Turn signal ON
- Vehicle theft deterrent
• Door lock interface--Refer to Power Door Locks Description and Operation .
• Exterior and interior lighting control--Refer to Exterior Lighting Systems Description and Operation .
- Automatic lighting control
- Backup lamps
- Daytime running lights (DRL)
- Fog lamps
- High/low beam head lamps
- Park brake lights
- Turn hazard lamps
• Gage control--Refer to Instrument Cluster Description and Operation .
• Heated seats--Refer to Heated Seats Description and Operation .
• Horn interface--Refer to Horns System Description and Operation .
• Instrument cluster indicator control--Refer to Instrument Cluster Description and Operation .
• Interior lighting--Refer to Interior Lighting Systems Description and Operation .
• Key-in-ignition sensing--Refer to Audible Warnings Description and Operation .
• Parking brake state sensing--Refer to Brake Warning System Description and Operation .
• Retained accessory power (RAP)--Refer to Retained Accessory Power (RAP) Description and Operation .
• Rear compartment interface--Refer to Power Door Locks Description and Operation .
• Rear defogger--Refer to Rear Window Defogger Description and Operation .
• Remote function control--Refer to Keyless Entry System Description and Operation .
• RFA communication link--Refer to Keyless Entry System Description and Operation .
• Seat belt use sensing--Refer to Seat Belt System Description and Operation .
• Theft deterrent vehicle/content--Refer to Content Theft Deterrent (CTD) Description and Operation or Immobilizer Description and Operation .
• Washer solvent level sensing--Refer to Wiper/Washer System Description and Operation .
• Wiper/washer--Refer to Wiper/Washer System Description and Operation .
1helpful
1answer

I have a 2005 Buick Terraza. When I put in gear and drive it starts dinging and indicates that a side door is not closed. They are and I have cleaned the contact plate.

This warning indicator is controlled by the BCM - body control module . You cant turn it off , you need to fix the faulty input switch that signals the BCM that the door is open .
Body Control Module
The various body control module (BCM) input and output circuits are described in the corresponding functional areas indicated on the BCM electrical schematics. The BCM functions include the following:
• Battery rundown protection--Inadvertent power--Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
• BTSI/automatic transmission shift lock control--Refer to Automatic Transmission Shift Lock Control Description and Operation in Automatic Transaxle - 4T65-E.
• Bulb check--Refer to Instrument Cluster Description and Operation in Instrument Panel, Gages, and Console.
• Chimes--Refer to Audible Warnings Description and Operation in Instrument Panel, Gages, and Console.
- Check gages
- Content theft deterrent
- Door ajar warning
- Headlamps ON
- Key-in-ignition
- Oil reset
- Park brake warning
- Seat belt not fastened
- Turn signal ON
- Vehicle theft deterrent
• Door lock interface--Refer to Power Door Locks Description and Operation in Doors.
• Exterior and interior lighting control--Refer to Exterior Lighting Systems Description and Operation in Lighting Systems.
- Automatic lighting control
- Backup lamps
- Daytime running lights (DRL)
- Fog lamps
- High/low beam head lamps
- Park brake lights
- Turn hazard lamps
• Gage control--Refer to Instrument Cluster Description and Operation in Instrument Panel, Gages, and Console.
• Heated seats--Refer to Heated Seats Description and Operation in Seats.
• Horn interface--Refer to Horns System Description and Operation in Horns.
• Instrument cluster indicator control--Refer to Instrument Cluster Description and Operation in Instrument Panel, Gages, and Console.
• Interior lighting--Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
• Key-in-ignition sensing--Refer to Audible Warnings Description and Operation in Instrument Panel, Gages, and Console.
• Parking brake state sensing--Refer to Brake Warning System Description and Operation in Hydraulic Brakes.
• Retained accessory power (RAP)--Refer to Retained Accessory Power (RAP) Description and Operation in Retained Accessory Power.
• Rear compartment interface--Refer to Power Door Locks Description and Operation in Doors.
• Rear defogger--Refer to Rear Window Defogger Description and Operation in Stationary Windows.
• Remote function control--Refer to Keyless Entry System Description and Operation in Keyless Entry.
• RFA communication link--Refer to Keyless Entry System Description and Operation in Keyless Entry.
• Seat belt use sensing--Refer to Seat Belt System Description and Operation in Seat Belts.
• Theft deterrent vehicle/content--Refer to Theft Systems Description and Operation in Theft Deterrent.
• Washer solvent level sensing--Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems.
• Wiper/washer--Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems.

As far as the sliding doors , pull the fuse's
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2answers

2007 Kia Sportage Front Wheel Drive 4 cyl, Automatic. Rear window wiper suddenly failed. Power to motor checked and confirmed, but once it is mounted, it quits. New motor mounted, same problem. All fuses...

Not sure about your car, but on my Chrysler mini van the same problem happened. The problem was not the motor but the body control module. The unit had 2 relays, but the BCM actualy controls the unit. To replace the BCM was $450. I bypassed the problem by installing an on/off switch inside the car and activated the motor by by passing the BCM at the relay. That was 3 years ago, still works great. Your BCM may be the problem. Check the schematics of the relays and try doing the same.

If you don't have the manuals, your local library has online access to most service manuals that you would have to pay for. Many time you can get access to them through their website if you have a library card. If not, go the library and get full free access to all the major car service manuals for free!
0helpful
1answer

Why will rear hatch not unlock?

I assume you are using a keyless entry, in which case - you need to replace the sensor for the rear hatch

Graham
0helpful
2answers

Read door lock

check the rear hatch electric lock. It may have a wire that came loose from shutting the door hard over time. Hope this helps, good luck.
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1answer

Back hatch on 2004 chevy trailblazer will not open...

You could have a bad Lift Gate Module (LGM) or a broken wire in the wire harness going thru the rubber boot between the body and the lift gate.
But first check fuse #19 in the rear fuse panel.
0helpful
1answer

2004 GMC Envoy rear hatch complete door wont

I have this same problem currently...did you find anything out about it?
4helpful
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2004 GMC Envoy rear hatch complete door wont

door lock actuator solenoid ( inside of door) needs to be replaced
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