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

91 guage cluster issues

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Old Mar 3, 2007 | 10:25 AM
  #1  
814speed's Avatar
814speed
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Default 91 guage cluster issues

The digital portion of my guage cluster will go on the fritz whenever my car hits a bump. I can tap on the front of it and it starts working again but here lately it has gotten worse. I havent seen any rebuild sources for the later model clusters. I assume it is becouse not many people have problems with them. Any one else experience this?
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Old Mar 3, 2007 | 02:08 PM
  #2  
1lapRacer's Avatar
1lapRacer
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From: jax fl
Default re: dash cluster

I had the same exact issue with my 91. It took a long time to sort out but here is what I did the results and the end result.

First I pulled the dash cluster out. I pulled it apart and reseated and cleaned the connections. That seemed to make it better for a week or so. then it started to give me the same issue. Push on cluster hit the dash and it would start working again.

So I bought a 93 or so cluster on ebay. It read complete garble when it was installed. I pulled the old lcd display card from the 91 and inserted it into the 93 cluster. All works well now. I believe based on my experience that to make a later cluster work you have to put in an earlier lcd for it to read correctly. A search of the forums here showed mentions to a document on how to make a new cluster work with a 90/91 but, I could never find the document.

I suggest you look for a 91 or 90 cluster on ebay and go that route or worst case a newer cluster and move your lcd over and hope the lcd panel is not your original problem.
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Old Mar 3, 2007 | 03:36 PM
  #3  
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vinnies87
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Default

I don't think you need to replace your cluster, sounds more like a ground issue... before going that route, check this out.
http://www.batee.com/corvette/dcrg/index.shtml

a major part of problems can be resolved with this doc.
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Old Apr 5, 2007 | 11:17 PM
  #4  
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814speed
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Default

I took it apart and cleaned the connections. I also used a little dielectric grease on the main connection. It works like a champ now. I suspect the main connection was the problem. Thanks for everyone's input.
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