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

Speedometer issues!

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Old Feb 24, 2011 | 02:01 PM
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sdennis21's Avatar
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Default Speedometer issues!

I have a 1993 C4 and am having issues with my speedometer. It reads "0" for the first 10 minutes of driving or so, then the speedometer kicks in. When the speedometer is at "0", the odometer isn't working either. I bought the car with a busted steering column, replaced it and everything is working fine, but the speedometer. All the other guages seem to be fine.

I'm not sure that the column has anything to do with it or not, just thought i would throw that out there. Where do I start?
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Old Feb 24, 2011 | 02:11 PM
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Speed sensor seems to be a good place to start... but I think that would throw a code... Is your SES light on?
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Old Feb 24, 2011 | 03:34 PM
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No, I don't have any warning lights on. It is weird though because a couple of times the center square where the speedometer should read is blank, just the orange backlight. Then, it may come back on and register a speed. And occasionally, the speed it registers is not correct. I would love if someone could offer some basic things to check. I'm hoping it's not going to need a new instrument cluster...
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Old Feb 24, 2011 | 06:39 PM
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I would start by checking the connections at the rear side of the cluster, sound like a ground issue.

Last edited by twin540; Feb 24, 2011 at 06:44 PM.
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Old Feb 24, 2011 | 06:43 PM
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Buy a 93 electrical service manual . Well help you a ton ..
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