Question about 2004 Pontiac Grand Prix

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My hud and dic stopped working. The fuse is ok. Any suggestions?

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I've never seen this problem personally, but I'd start with just pulling the dash apart and checking the connectors. I'll bet both use the same wiring harness. Just follow the wires back from the DIC and look for any abrasions or issues.

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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How do i bim and brighten dash light 2002 buick lesabre


bim or DIM ? the dimmer switch ! Interior Lamps
The interior lamps consists of two groups, lamps that can not be dimmed and lamps that can be dimmed. This first group consists of lamps that may not be dimmed. This includes those lamps that may be manually turned on by placing the interior lamp switch to the DOME position, or by opening a door or a compartment:
• Door courtesy lamps
• Footwell courtesy lamps
• Instrument panel (I/P) compartment lamp
• Overhead console courtesy lamps
• Reading courtesy lamps
• Rear compartment courtesy lamp
• Roof rail courtesy lamps
• Sunshade vanity mirror lamps

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:
• 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
• IPC
• Radio
• Steering wheel controls
The following components are grounded at G201:
• Cigar lighter lamp
• DIC Switch
• HUD switch

Mar 13, 2017 | 2002 Buick LeSabre

1 Answer

My hud In My Grand Prix Doesnt Work


Which fuse ? Just to make sure you looked at the right one .
DISPLAYS fuse 10amp located in the I/P fuse block .
Do you know what DTC'S - diagnostic trouble codes are ?
DTC B3619
The HUD detects that the HUD change page switch signal circuit is low for greater than 15 seconds.
DTC B3634
The HUD detects that the HUD dimming signal circuit is low for greater than 15 seconds

Diagnostic System Check - Head Up Display
Install a scan tool.
Does the scan tool power up?
Go to Step 2
Go to Scan Tool Does Not Power Up in Data Link Communications
2
Turn ON the ignition, with the engine OFF.
Attempt to establish communication with the following control modules:
• Head Up Display (HUD)
• Instrument panel cluster (IPC)
• Powertrain control module (PCM)
• Driver information center (DIC)
• Radio
Does the scan tool communicate with the control modules listed above?
Your best bet , take it to a qualified GM service center .

Sep 02, 2017 | 2004 Pontiac Grand Prix

2 Answers

My Driver Information Center (DIC) stopped working in my 2005 Pontiac Grand Prix. The fuse seems to be OK since the other lights are working in the instrument panel. The DIC isn't showing anything. Any...


REMOVE THE DIC CENTER SEE IF IT IS GETTING POWER.SHAKE WIRES SEE IF DIC CONTROL WILL LIGHT UP WITH IGNITION ON ENGINE OFF.IF POWER GOING TO DIC CENTER AND SHAKE WIRES YOU STILL DONT SEE THE OIL DISPLAY LIGHT UP.DIC CONTROL COULD BE FAULTY.

Sep 04, 2011 | 2005 Pontiac Grand Prix

1 Answer

The HUD on my 2004 Pontiac Grand Prix GT went out. I checked the fuses and they are all okay. What eles could it be? Thank you, Lisa


The HUD may still be working but the spring has broken which holds the mirror to reflect the monitor image to the windscreen. Go outside the car and look straight down the HUD tunnel to see if the HUD is still on. If it is, then do a search on google for how to fix the hud. There are some very detailed instructions (with pics) to show you how to do this. Really pretty simple.

Jul 27, 2011 | 2004 Pontiac Grand Prix

2 Answers

The DIC is very dim and hard to read & then it gets bright on my 2007 LaCrosse CXL


Is it just the dic. or is the cluster and radio also dim. If just the dic possible feed wire from bcm. dic will have to be removed and voltaged measured. IF ok then dic is defective. If cluster and radio are dim, possible alternator spiking, Should be looked at by dealer, have dealer run vin. possible service builten on this problem. Kirk fe6fc

Apr 03, 2011 | 2007 Buick LaCrosse CXL Sedan

1 Answer

The Driver Information Center (DIC) 99 Montana is out


I am assuming that the DIC does not "power-up" at all.

Check your owner's manual to see which fuse powers the DIC. If the fuse is OK, you need to get your hands on a wiring diagram and remove the DIC from the dash so you can check to see if you have a good ground on the ground wire to the DIC. Then check to make sure you have battery voltage to the B+ circuit to the DIC. If the proper voltage and ground are present, you will have to take the DIC to your local dealer for repair. Many GM dealers have an exchange program where you can turn your old DIC in and get a "remanufactured" one on the spot. Others will send your DIC out for repair and call you when it is returned to them.

Oct 11, 2009 | 1999 Pontiac Montana

1 Answer

2004 GTP HUD Out


If fuse check out. All electronics fail some goes out sooner than others; Once the HUD unit its out you have to replace it unless you electronic guru know about electronics and solder, go to the junk yard and get a replacement. New unit will cost an arm and a leg. I had the same car and my went out on me 3 years after, thank GOD it was still under the warranty. wish lot of luck finding use one.

Aug 24, 2009 | 2004 Pontiac Grand Prix

2 Answers

HUD will not light up


If you peek down inside the windshield, you'll probably see the HUD is working. A common issue is that the adjustment spring will break, making the HUD invisible because it is adjusted out of range. The spring can be replaced by removing the cluster then the HUD unit.

Aug 13, 2009 | 2004 Pontiac Grand Prix

3 Answers

2005 grand prix HUD can only be seen when i look below steering..


There should be a switch on the dash somewhere to adjust the position of the HUD. I'm thinking it's near the driver information center (DIC). I just worked on one of these cars a week ago and I remember seeing the switch. Just can't remember exactly where but I know it's there. Hope this helps.

May 12, 2009 | 2004 Pontiac Grand Prix

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