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#101 |
![]() Join Date: Aug 2010
Location: ottawa canada
Posts: 156
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I don't think the Courtesy fuses are the same as illum. fuses so clarify what the RH illum. fuse feeds. As stated previously the LCD fuse feeds the Chime & Instrument panel then to the SEc. Lt.
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#102 |
![]() Join Date: Aug 2010
Location: ottawa canada
Posts: 156
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Also the interior lights will not show with open door if the ambient light is bright. Cover the sensor in the dash ( beside TRIP/ MONITOR) with some tape & see if int. lts. work.
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#103 |
Join Date: Nov 2019
Location: Garrison, New York
Posts: 60
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Interior lights not going on when door opens in pitch black garage.
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#104 |
Join Date: Nov 2019
Location: Garrison, New York
Posts: 60
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I've been through the FSM electrical diagnosis section at length and it seems like the common denominator for all that is not working is the CCM. Is this a part that can still be gotten through Chevy? Anybody have any experience in replacing it? I know it has to be programmed so does that mean it's a dealership repair?
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#105 |
![]() Join Date: Sep 2008
Location: Mullica Hill, New Jersey
Posts: 2,574
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The most likely , but unfortunate culprit.
No longer available. Reach out to Top Toy on this Forum. He is parting out his 93. Perhaps he still has it. You then will need to find one to program it. Otherwise, your car will have his info. I doubt that expertise / equipment is at any Chevrolet dealer, but it is still done. ![]() Marty |
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#106 | |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,154
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I don't a CCM can be programmed more than once.. If it can be done I am all ears, I have one I want reprogrammed
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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#107 |
![]() Join Date: Aug 2010
Location: ottawa canada
Posts: 156
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The CCM has likely always been in the back of our mind on this however lets exhaust as many possibles as we can. I still think the Engine block ground connections should be checked & cleaned. G105 & G106 I believe. This is common to much of your issues!
It would also be appropriate to access the CCM & follow the test procedure in the FSM to actually determine a CCM failure. You will have to access the CCM anyway if you do find a replacement. |
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#108 |
Join Date: Nov 2019
Location: Garrison, New York
Posts: 60
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Grounds are good. Trying to find a CCM replacement before I pull it out.
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#109 |
![]() Join Date: Sep 2008
Location: Mullica Hill, New Jersey
Posts: 2,574
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https://corvetteparts.com/item/rebui...-bcm-1992-1993
While I am still not quite convinced for certain that it is the CCM, here is how to resolve it if it is. They rebuild and re-program your unit. Most CCM errors or failures cause SYS to Flash, yet you continue to have no display anywhere on the IP. While the CCM is suspect, there just seems to be more going on................. A pinched wire A short somewhere on the IP I guess it could not hurt to send your CCM in for repair, but requesting them to alert you if no trouble is found, stating that you will pay either way. Keep us posted. ![]() Marty |
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#110 |
Join Date: Nov 2019
Location: Garrison, New York
Posts: 60
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Will do. Going to wait a few days too cold in the garage right now to continue. Thanks for the advice.
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