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#11 |
Join Date: Jan 2005
Location: New Berlin WI
Posts: 247
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What is the cdm box?
I have not pulled my stereo yet, but I sispect I will be pulling the head unit next year as the CD player does not work. All the speakers work and if you ask me sound very good!! I think the stereo has a great sound for stock. |
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#12 |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
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Our GM/Bose system is made up of components that are in different locations. The "radio/CD/CA" in the dash is just the place where the tape deck & CD deck and the display functions live, called the head unit or control head unit. I think that there was no room for the rest of what makes the sound system work at that location.
CDM box is the rest of the "stuff" ya need to make the head unit actually do something. It houses the "tuner" circuits for the radio as well as the circuits that "read" the signal from the CA tape heads and the signal from the CD "head"(?). There may also be some kind of pre-amp function in that box because it distrubutes the signal to the speakers and has the circuits that adjust the fade, bass & trebble and it may even house the clock function. The last component are the speakers with their individual amps at the four corners. Oh, yea, I forgot the wiring! ![]() In my 90 the CDM is under the glove box....sort of...and just inboard of the fuse panel. That place that Rich was talking about has an excellant "how to" section that covers the locations of various components (they moved over the life of the C4) and a good step by step on how to do the R & R on the stuff. The early Z CDM box R & R will make ya get religion! There is just not that much room to get human sized hands up in there to work. Ya know what it's like with a C4, 15 lbs o' stuff in a 5 lb bag....and it's a jig saw puzzle to boot! There is a ton o wiring in the way and the bracket that holds it is one of those multi-function types that drive ya to swear! ![]() ![]() Tom
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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#13 | |
Join Date: Dec 2007
Location: Fremont,Ca
Posts: 3,058
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#14 |
![]() Join Date: Aug 2006
Location: Edmonton, Alberta or Phoenix, Arizona
Posts: 2,741
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as i said a few days ago i put the system back in my Ruby. next winter i'll send my 90 unit out so i'm curious if your CDM goes IN easier than it came out for you. if it's a b...atch maybe i'll send my 95 out first ha, ha. no, the 90 has to get done sooner or later. i'm lucky only one of my cars has the box in the bad area, could be all three
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There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y. |
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#15 | |
Join Date: Dec 2007
Location: Fremont,Ca
Posts: 3,058
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#16 |
![]() Join Date: Aug 2006
Location: Edmonton, Alberta or Phoenix, Arizona
Posts: 2,741
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Got it out of my 90 last night...wasn't too, too bad. I can see it being a pig to get back in though, for sure
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There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y. |
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#17 |
![]() Join Date: Aug 2006
Location: Edmonton, Alberta or Phoenix, Arizona
Posts: 2,741
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My stereo showed up from Doctor Don's today. Now we'll see how much fun the CDM box is to get back 'IN' the dash of my 90
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There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y. |
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#18 |
Join Date: Aug 2005
Location: Iuka, Mississippi 38852
Posts: 756
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Better keep a New Testament handy. You might need it when all your blood runs to the top of your head from standing on it.
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#19 |
![]() ![]() Join Date: Mar 2006
Location: Innsbrook, Missouri
Posts: 1,727
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richard, missed you at bowling green this year, again???
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#20 |
Join Date: Aug 2005
Location: Iuka, Mississippi 38852
Posts: 756
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Yep, I was racing boats. I really wanted to go to the gathering but was in Poplar Bluff, Mo.. Got a 4th place out of a class of 14. I broke out with a 9.883 and other guy ran a near perfect 10.02 I`ll be up in your neck of the woods at Creve Couer in two weeks. Ever seen a blown alcohol boat run 175 mph? Come on over. I`ll put you to work.
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