C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

No centre cluster lights or LCD

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Old Jul 20, 2024 | 02:25 PM
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Default No centre cluster lights or LCD

1995 , no cluster back lights , no LCD display , got a rebuilt one still no change.5a Fuse has no power to it . I have tried a new BCM still no luck. Grounds seam ok ? Tach and gauges work on cluster. Any help would be greatly appreciated.

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Old Jul 20, 2024 | 03:43 PM
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Check "Cluster Fuse #27" and "LCD Fuse #38"
Also check Instrument Cluster Connector Cavity A7 CKT 150 ( Ground) for an open
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INSTRUMENT CLUSTER.pdf (348.2 KB, 134 views)
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INSTRUMENT CLUSTER 2.pdf (329.6 KB, 75 views)
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INSTRUMENT CLUSTER Connector.pdf (332.6 KB, 256 views)
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Old Jul 20, 2024 | 07:48 PM
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Default Thank you

Thanks for the information, I’ll keep you updated
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Old Jul 24, 2024 | 12:38 PM
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Default Location of grounds

I’m trying to test all the grounds to see if that’s part of my issue, I have no horn, no interior lights when the doors open, no dash back lights in cluster. Still no LCD display. Third row of fuses have no power to them ??
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Old Jul 24, 2024 | 03:56 PM
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There are Two maxi -fuse blocks that are located under hood near battery. Check Fuse #1 in the "Forward Lamp Fuse Block" for Interior Lighting

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Old Jul 25, 2024 | 04:54 PM
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Those have all been checked and are good. I have interior lights when I turn the dimmer on the head light switch all the way on.
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Old Jul 29, 2024 | 07:48 PM
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Default Think it’s the CCM?

Could the ccm be my issue? Reading up on this. Just wondering if it can be programmed or checked with a scan tool to determine if this is the issue
1995 C4
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Old Jul 30, 2024 | 09:49 AM
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Everything you need to Diagnose and Test CCM Functionality is listed in this CCM Section. Lots to absorb so take your time and re-read several times if needed. The fun of troubleshooting is only possible through proper information.
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Old Jul 30, 2024 | 07:59 PM
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Default Thank yiu

Thank you so very much
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Old Jul 30, 2024 | 08:48 PM
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Originally Posted by Mt150
Thank you so very much

In my 85 I had a ton of these that were opened too much and needed to be replaced in the fuse panel itself. Granted, your car is much newer but its worth a look.


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Old May 19, 2025 | 08:06 PM
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Default Help

Did this ever get solved!!? I’m having the EXACT same issue on my 94. Just ripped the CCM out and tested that. Need some more help please!
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