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Old 06-10-2014, 01:29 AM   #1
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Default HUD Inoperable

Hi all. Seems my heads up display is not functioning in my 93 SSEi. Does not light up at all, so I know it is not an adjustment issue. Fuses that I thought relevant have been checked. Any other suggestions?
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Old 06-10-2014, 11:51 AM   #2
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mine has a brightness thing you cant see it if that is turned down, your 93 have that?

i dont know what to offer otherwise, the wire schematics like haynes and that only cover engines and lights, you would have to get a gm manual for it
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Old 06-10-2014, 03:43 PM   #3
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You probably have the HUD brightness turned down too low.
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Old 06-11-2014, 09:56 AM   #4
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Quote:
Originally Posted by 2kg4u View Post
You probably have the HUD brightness turned down too low.
Unfortunately not this simple. Slider does nothing. So I thought maybe someone disconnected the switch for whatever reason, also not the case. Any other suggestions?
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Old 06-11-2014, 10:12 AM   #5
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Did you check fuses? I think it might be fuse #6 in the engine compartment fuse block.
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Old 06-11-2014, 10:22 AM   #6
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I hope it doesn't get to that point, but in case you have to remove the HUD I found a proceedure:

You will have to remove the dash cluster to get to the hud retaing screws.




Use a plastic trim tool to remove the ignition switch bezel.



Pull the instrument panel (I/P) accessory trim plate rearward slightly for access to the steering column filler.
Remove the steering column filler.
Tilt the steering wheel to the lowest position.
Grasp the edge of the I/P cluster trim plate. Pull rearward to disengage the retainers.
Disconnect the electrical connector from the headlamp dimmer switch.



Disconnect the electrical connector from the driver information display assembly.
Remove the driver information display screws.
Remove the driver information display.



Remove the instrument cluster.
Remove the windshield pillar garnish moldings.


Notice: Use the following method to disengage the Head Up Display (HUD) retainers. Do NOT pry the retainers with a flat-bladed tool or other similar device.
  1. Disengage the I/P upper trim panel retainers on the sides of the HUD.
  2. Disengage the retainer rearward of the HUD.
Failure to follow this method could break the tab on the HUD.


Remove the HUD screw.



Remove the HUD bolts.


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Old 06-11-2014, 10:45 AM   #7
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Look down through the hole in the IP to see if the HUD display is lit up or not. One possible failure mode is a spring which holds the HUD up can wear through the plastic and cause the HUD unit to drop. If that happens, the HUD will continue to function but it will not display on the windshield.
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Old 08-12-2014, 02:06 PM   #8
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Quote:
Originally Posted by 2kg4u View Post
Look down through the hole in the IP to see if the HUD display is lit up or not. One possible failure mode is a spring which holds the HUD up can wear through the plastic and cause the HUD unit to drop. If that happens, the HUD will continue to function but it will not display on the windshield.
Sorry for the late reply. I see the adjustment works as the unit will swivel. It is not reflecting any image at all, or lighting up. I have looked down the top of the windshield at night and can't see anything lighting up, dim or not. Is there an eazy way for me to access the connector to the HUD to see if it is simply a loose connection? Is there a fuse that controls it?
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