Question about 2003 Buick Park Avenue

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Digital display on climate control is very dim on 2003 park ave.

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It's pretty easy to fix.
1. Remove "wood" trim from below module.
2. Remove 2 screws from tabs at sides of module
3. Remove module (may neeed to pry a little, it's tight.) and connector plug.
4. Remove 2 screws and seperate halves of module
5. Unplug harness to from circuit board (pull the plug, not the wires)
6. Pull the 2 plastic tabs at back of box to remove circuit board, which will now slide out.
7. Inspect the board. On mine, 4 tan components with a single lead coming out each end had cold (gray in color) solder joints. I simply resoldered the joints, reassembled and it's perfect.
8 ***NOTE After reinstalling, start the car and run for a full minute before touching any buttons...this somehow sychronizes the module.

Enjoy!

Posted on Jan 28, 2010

  • kendiy Dec 06, 2010

    Do you have a picture of the 4 tan components that you needed to resolder? Or can you describe where they are located on the PCB?

  • Ray Smythe Dec 06, 2010

    I don't have a picture. The module is in the car. The "tan components" have a lead sticking out each end and soldered to the pcb. They stand away from the board more then 1/4' with nothing but the solder joints and leads holding them. They are the most obvious components on the board. That's all I remember about them. It's been a while since I fixed it. Good luck!

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Posted on Jan 02, 2017

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92 park ave AC won't go to auto stays on economy


If the freon level is ok, you have an electrical problem somewhere. The system will not activate because the control module "thinks" the freon level is low or because of another problem. It could be the module too.
You'll need a shop manual to get the test procedures for climate control ac to check the components and circuits.

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There are 3 things to think what can be the problem.
1. there is a day/night sensor on the dash.{not working properly}
2. there is a variable dimmer for the cluster illumination. loose connector or terminals.
3. The display itself.{can be defect} loose connection at the display or terminals.
lot of work.

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Oem Radio installation


*** 91 park ave with delco bose =

black = ground
dark green = lights on input
grey = panel lights
pink = on input
yellow = power input
orange = battery power input

nca = shield ground
tan = left fr spkr +
orange/black = left & right spkr -neg
lite green = right fr spkr +

nca = shield ground
dark blue = right rear spkr +
dark green/yellow = right & left spkr - neg
brown = left rear spkr +

purple/white = display dim output
pink = vehicle speed input
-----------------------------------------------------------------------
**** 91 park ave without delco bose =

purple/white = display dim output
pink = vehicle speed input

grey = left front - neg
tan = left front + pos
dark green = right front - neg
light green = right front + pos

black = ground
dark green = display dim signal
grey = panel lights
pink = power antanna
yellow = ign input
orange = battery power
light blue = right rear - neg
dark blue = right rear + pos
yellow = left rear - neg
brown = left rear + pos .

there YA go

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1 Answer

What size fuse (and where are they located)are needed to fix the following non lit accesories on a 2003 Buick Le Sabre ltd? -Steering Wheel accesories - Climate Control, Volume - Radio controls. -Climate...


Are all of these not working ?
• Air temperature switch
• Cigar lighter lamp
• Door switches
• Driver information center (DIC) switch
• Headlamp switch
• Head-up display (HUD) switch
• Heated seat switches
• HVAC control assembly
• Instrument panel cluster (IPC)
• Memory function switch
• Radio
• Steering wheel controls
• Window switches

Interior Lamps Dimming
This group of interior lighting includes lamps which may be dimmed. This group uses a combination of class 2 controlled illumination and incandescent lamps:
• Air temperature switch
• Cigar lighter lamp
• Door switches
• Driver information center (DIC) switch
• Headlamp switch
• Head-up display (HUD) switch
• Heated seat switches
• HVAC control assembly
• Instrument panel cluster (IPC)
• Memory function switch
• Radio
• Steering wheel controls
• Window switches
For the interior lighting to be dimmed the following conditions must be met:

Here is a discription of how they work ,factory service info.
• A low light level has been detected by the dash integration module (DIM)
• Headlamp switch is placed in to the PARK or HEAD position
• Ignition switch is placed in the ON position
Then all class 2 displays and all incandescent back lighting will be illuminated to the level set by the instrument panel (I/P) dimmer switch. When the I/P dimmer switch is moved from MIN to MAX, all class 2 displays and all incandescent back lighting respond from minimum intensity to maximum brightness.
The DIM supplies battery positive voltage to the coil side of the PRK LP relay in the rear fuse block.
When the I/P dimmer switch is moved from MIN to MAX, then the instrument panel module (IPM), W/CJ2, or climate control panel (CCP), W/C67, applies a message to the class 2 communication circuit to the DIM. The DIM then applies a ground to the park lamp relay control circuit. This energizes the PRK LAMP relay and allows battery positive voltage to be applied through the DIMR fuse to the DIM. The DIM then illuminates the following incandescent lamps through the incandescent dimming output circuit:
• Cigar lighter lamp
• DIC Switch
• Headlamp switch
• HUD switch
• HVAC control assembly
• IPC
• Radio
• Steering wheel controls
The DIM also applies a message to the following class 2 controlled illumination components:
• Drivers door module (DDM)
• HVAC control assembly
• IPC
• Radio
The DDM will then send a message through the simple bus interface (SBI) to the RH front door module (RFDM). The door modules will then illuminate the following components through the incandescent dimming output circuit:
• Air temperature switch
• Heated seat switches (W/KA1)
• Memory function switch (W/A45)
• Power door lock switches
• Power window switches
The ground for these components are provided from the DDM and RFDM.
The following components are grounded at G200:
• Headlamp switch
• HVAC control assembly
• Radio
• Steering wheel controls
The following components are grounded at G201:
• Cigar lighter lamp
• DIC Switch
• HUD switch

Having the vehicle checked for DTC'S - diagnostic trouble code's would probably be your best course of action .
DTC B2556 (1)
The I/P dimmer switch is a potentiometer. The instrument panel module (IPM) determines the control setting based on the voltage from the I/P dimmer switch. The IPM sends out a class 2 message to the dash integration module (DIM). The intensity of the interior backlighting shall be adjustable when ever the park lamps are on. The intensity of the vacuum florescent displays shall only be adjustable when it is night and the park lamps are active.
DTC B2627
DTC B2628
Circuit Description
The I/P dimmer switch is a potentiometer. It is powered by the HVAC control module. The HVAC control module determines the level of dimming desired based on the voltage from the I/P dimmer switch. The HVAC control module converts the I/P dimmer switch feed back voltage to a digital signal and puts it on the Class II communication bus.

Dash Integration Module (DIM)
The DIM is wired to the class 2 serial data line. The various DIM input and output circuits are described in the corresponding functional areas as indicated on the DIM electrical schematics.
The DIM functions include the following:
• Control of headlights and exterior lamps
• Horn relay control
• Interior lamps incandescent dimming
• Lamps On signal with wiper/washer
• Power moding control over Class 2 serial data line
• Steering wheel controls
• Storage of the clock settings and, sending a message out on the class 2 serial data circuit in response to requests from other modules

Your best bet ,take your vehicle to a qualified repair shop.

Nov 20, 2017 | Buick LeSabre Cars & Trucks

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