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.
SOURCE: catalytic converter,1990 buick le sabre
The Catalytic Converter is part of the muffler system, and can be found between the rear of the engine and before the muffler on the exhaust system.
SOURCE: cruise control switch & radio controls in steering wheel not work
there is no relay. both those go through the clockspring....
SOURCE: Cruise control,and radio controls on steering wheel, now air bag
The problem is the coiled ribbon contact under the steering wheel (we call it the clock-spring contact) that connects the stereing wheel controls to the steering column wiring harness, this is a printed circuit that is coiled to allow the wheel to move and still have a psychical contact for the wheel switch's and the airbag, anyway replace that contact coil, u must disarm the airbag to do this repair, follow the factory procedure to do this or serious injury can result if the airbag fires.
SOURCE: Steering wheel lamps do not work (radio controls, temp, cruise)
The lights on the steering wheel are in the switches. To fix the lights, the whole switch needs to be replaced. Same thing goes for the Tempature Controls and radio. Overall, I think it would be very expensive to replace all of the switches to get the lights working. I have the same vehicle, and almost all of the lights are out.
I think the lights behind the gage controls are replaceable, although you still have to rip out most of the dash to get to them.
I have the auto-sense wipers, so I was leaving the wipers on all the time, and the would only work when needed. The bad part I finally found out about this was that while the wiper switch is on (even though they were not wiping), it caused all of the dash lights, switch lights and rear parking light to be on. I think this alone significantly cut down on the life of the bulb.
For now, I am just living without the lights. The temperature control is very expensive (just the part alone).
You can usually find the best price for these things at http://www.rockauto.com
SOURCE: defroster / heater fan won't shut off /1995 Buick Le Sabre
Moe, I think you hi blower relay is bad. With this I mean the contacts in the relay are welded shut and you should replace the relay if the blower is on high all the time. Do this by removing the black plastic cover right behind the engine and removing the relay all the way to the drivers side of the relay bank. you will have to insert a small screwdriver under the relay and bend the little tang that holds the relay in place. then slide the relay out towards you and remove the green lock tab and unplug the relay from the wiring harness. if the blower finally stops then just insert a new relay in its place and reassemble in the reverse order. Good luck.
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