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HUD not working Lowbeams out

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Old Mar 25, 2010 | 06:10 AM
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Default HUD not working Lowbeams out

Ive tried researching this and just cant seem to find out these 2 issues I have.The HUD the up and down mirror works because I see it moving when I push the button but there is no projection coming out of it.Just before this happened it wouldnt turn off(I was thinking a fuse or stuck on off switch) The lowbeams arent working either(this was like that befor the HUD) any help is appreciated.
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Old Mar 26, 2010 | 10:45 AM
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please help, I swear I tried searching These mistery fuses dont seem to exist???
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Old Mar 26, 2010 | 11:10 AM
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Old Mar 26, 2010 | 11:24 AM
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Below is the HUD schematic from the O2 service manual:

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Old Mar 26, 2010 | 01:49 PM
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Thank you very much!!!Its at least a start.Now I need to hunt down the source of the problem, This should def help!!!
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Old Mar 27, 2010 | 01:46 PM
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Checked fuses and nothing found???Now what? I guess its off to the stealership(after I double check the bulbs of course)...
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Old Mar 28, 2010 | 11:49 AM
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I just got the car And Just realized that I have Xenon HID for low beams these must be the culprit.The highbeams are working the low beams(both) are out.Anyone have any input on these(Although Im still assuming its not a bulb issue Havent had time to check(new baby at home as well):o
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Old Mar 28, 2010 | 08:19 PM
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Although Im starting to feel like Im talking to my self, I played around a bit with some wires and now the HUD is working again.
BUT the HID low beams arent working any one have any experience with these things??? are there fuses in the ballasts or something that the only thing I havent checked.
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Old Mar 30, 2010 | 08:52 PM
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Just got back from the STealership.I knew it was gonna be a little for a lot of money but jeeze!!! Astonomical prices.... at least the problem is solved it ended up being a relay and some headlight control module.The HUD supposedly needs to be replaced all together(gonna have to wait on this one)Hopefully no more electrical gremlins.
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Old Mar 30, 2010 | 09:36 PM
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Originally Posted by Th1
Just got back from the STealership.I knew it was gonna be a little for a lot of money but jeeze!!! Astonomical prices.... at least the problem is solved it ended up being a relay and some headlight control module.The HUD supposedly needs to be replaced all together(gonna have to wait on this one)Hopefully no more electrical gremlins.

The supply of C5 HUDs is limited. GM stopped selling them unless the purchaser was replacing an inoperative unit.

Bill
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