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

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Old Apr 11, 2014 | 07:44 PM
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Default tachometer

Hi everybody,

I own a 1984 4 plus three Corvette. The tachometer lights up but it says zero. A couple of days ago it was working and now. It just shows a zero. I looked at the pink wire that goes into the distributor. It is connected. any suggestions.

thank you
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Old Apr 11, 2014 | 08:49 PM
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Originally Posted by jseremba
I looked at the pink wire that goes into the distributor. It is connected. any suggestions.
Pink is the power to the coil ; white wire on the TACH terminal is the tacho signal wire

Also check the connection on the white wire to / from the tacho filter




Last edited by vetteoz; Apr 11, 2014 at 08:52 PM.
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Old Apr 11, 2014 | 10:22 PM
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thank you. I will give it a look
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Old Apr 18, 2014 | 08:51 PM
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Originally Posted by jseremba
thank you. I will give it a look
Mine had the wire broke right at the filter piece. It was hard to see. You can hook it up direct just to trouble shoot the filter.-T
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Old Apr 20, 2014 | 01:50 PM
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Originally Posted by kaniyrret
Mine had the wire broke right at the filter piece. It was hard to see. You can hook it up direct just to trouble shoot the filter.-T
that's what I did. What is the filter for? On my 69 Corvette I thought it was static suppression
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Old Apr 20, 2014 | 03:03 PM
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Originally Posted by jseremba
that's what I did. What is the filter for? On my 69 Corvette I thought it was static suppression
I m pretty sure that what it's for. Just to filter out any electrical interference.
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