Question about 1985 Chevrolet Corvette

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My 1985 corvette instrument cluster lights up but shows no information speed tach,, fuel

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85 corvette clurter problem

Posted on Feb 21, 2011

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Lcd probably are shot or could be a bad ground

Posted on Oct 22, 2010

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1 Answer

Tac and speedometer not working. What's problem?


Jeep XJ it is.
the Cluster is a computer. brain,
a stand alone display.
fuse 16 in PDC (cluster memory fuse)
and fuse 9 in JB . runs it. JB is cab fuse box.

so what works in the cluster, all things, but not speed or tacho.
engine runs ok
scan tool show no DTC errors.?
all warning lights in cluster work? at self test key?????

if the PCM can not comm, to the cluster, the cluster
can not show tach or speed, can't , and cant update odometer either
does the odometer roll moving>? i bet not

the cluster is a stand alone unit, with puter brain (processor)
fuel guage work?

if the scan tool shows U codes or C codes and comm errors
that must be addressed first. (cause)
see?
you cant fix cars, with out a $5 scan tool, cant. why not buy one
and use it?
ask how, 1000's of choices here... and more.


Feb 14, 2015 | 2000 Jeep Cherokee

1 Answer

How to trace this problem down.


I suspect the Tach gauge itself. or the connections. might try pulling the instrument cluster out and check the connections.

Aug 28, 2014 | 1992 Ford Bronco

1 Answer

Where is the instument cluster


the gauges you look at are the instrument cluster. (speed, tach, fuel, temp, etc)

Dec 14, 2012 | 1993 Geo Prizm

1 Answer

Weird instrument clusterl


The clusters in the 1985 Corvette are computer controlled, they are very prone to failure. I recommend you remove the cluster and send it in to be rebuilt. You can also get an exchange cluster for many suppliers of Corvette parts like Zips and others you can find on the internet. The cost was about $300.00 when I had mine done. Click HERE for one such repair center.

Jul 20, 2012 | 1985 Chevrolet Corvette

1 Answer

Tranmission and instrument cluster


The speed sensor on your trans sends a signal to the electronics telling it when to shift, this will be where you fault is.

Mar 05, 2012 | 2001 GMC Yukon XL

1 Answer

My gauges just stop working tach, speed fuel ,and heat


u have a failed instrument cluster, this is a common problem and is due to poor solder joints at the connector on the circuit board, it can be repaired by the dealer or u can send it out to a instrument cluster repair facility, there are many on the internet, they will provide removal instructions on request..

May 12, 2010 | 2000 Dodge Caravan

1 Answer

Only the speedo lights up, the tach, fuel gauge and pressure readings do not on my 1985 Corvette


HATE to be the bearer of potential bad news BUT , the C4 Vettes are notorious for having dash / instrument cluster woes .
Most likely , yours is a bad one .

Jun 08, 2009 | 1985 Chevrolet Corvette

2 Answers

Speedometer not working


I would hold off on trying to buy a new or used instrument cluster unless your sure thats the problem.... your vehicle is equipped with a speed sending unit and that can be faulty ask your self is the other functions of the cluster working? tachometer, fuel, lights etc? then may only be sending unit for speed have it checked out by a pro or follow instructions of troubleshooting section of your repair manual I always try to keep it simple did you check the fuses and relays? then move on from there. If it is sending unit or cluster heres a place I have used for years to get hceap good used and new parts Peach street autorecycling 18003652341 ggod luck and dont forget to rate me if I have helped.

Dec 29, 2008 | 2002 Chrysler Town & Country

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