Question about 1997 Saab 900

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Instrument pack My '97 900 SE Turbo instrument pack (speedometer, tachometer, etc.) will go completely dead for less than a second while driving, then restart as if I had just turned the car on.  It does not affect any other systems and the car continues to run as if nothing happened.  Any ideas?

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  • mapoling Aug 11, 2008

    Thanks - appreciate the help!

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I had the same problem and had to have the instrument cluster replaced.  The mechanic had to find a used one ($275)...the whole job was $660.

Posted on Apr 10, 2009

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You may have a faulty connection at fuse holder or relay which supplies instruments.
Hope this helps MMP

Posted on Aug 11, 2008

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1 Answer

Speedometer works but not the rpm gauge 98 Tahoe 5.7


The speedometer is operated differently then the tachometer. Tachometer
The tachometer displays the engine speed in revolutions per minute (RPM). Voltage pulses are taken from the ignition control module (ICM) (Gasoline) or the generator (Diesel) and sent to the tachometer. Solid state circuits convert the pulse frequency in order to move the pointer of the tachometer.

Tachometer Inoperative (Gas)
Step
Action
Value(s)
Yes
No
1
Did you perform the OBD II System Check been performed?
--
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check (5.0L/5.7L); Powertrain On Board Diagnostic (OBD) System Check (7.4L)
2
Remove the I/P Cluster.
Disconnect the Ignition Coil connector.
Connect a J 39200 DMM (continuity) between I/P Cluster connector cavity 6 and ground.
Is continuity present?
--
Go to Step 3
Go to Step 4
3
Locate and repair the short to ground in CKT 121 (WHT) between the Ignition Coil and the I/P cluster. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Refer to Instrument Cluster System Check
--
4
Connect a J 39200 DMM (continuity) from I/P Cluster cavity 6 to ignition coil connector cavity B.
Is continuity present?
--
Go to Step 5
Go to Step 6
5
Replace the I/P Cluster. Refer to Instrument Cluster Replacement .
Is the repair complete?
--
Refer to Instrument Cluster System Check
--
6
Locate and repair the open in CKT 121 (WHT) between the Ignition Coil and the I/P Cluster. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Refer to Instrument Cluster System Check

Dec 26, 2014 | 1998 Chevrolet Tahoe

1 Answer

I have a 2003 Nissan Sentra and while driving the instrument cluster will go dead no speedometer, tachometer, gauges, warning lights or cruse control.


Two things. The ground wire from the cluster is loose or the power wire to the cluster may be loose at the connector.

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GAGES QUIT


Check the connections on the back of the instrument cluster. It sounds like you have a faulty instrument cluster board, a poor connection and perhaps, but less likely, an ECU issue.

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1 Answer

2003 Silverado 4.8 V8. Speedometer and tachometer, as soon as underway, read past maximum. When engine is shut off guages do not return to "0"


Hi Norton,

What has happened is your speedometer and tachometer drive motors are failing inside your silverado instrument cluster. I see this very often in GM trucks, to fix the problem you need to have your instrument cluster rebuilt.

Check out this article that talks more about it http://drspeedometer.com/chevy-silverado-instrument-clusters-why-they-quite-working

Thanks,
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1 Answer

My gauges in the instrument panel are not working: speedometer, tachometer , fuel gauge etc.


If all the guages quit working at the same time, then it is probably a blown fuse. Check your fuse panels in the dash or under the hood. Look for a fuse that is labeled instrument panel or guages, it is probably blown.

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2 Answers

Instrument cluster


Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Silverado instrument cluster repair
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I have problems with my tachometer and speedometer, sometimes it seems that it doesn't work, but when i give my instrument panel a slight pounding it will be on its normal term, what seems to be the...


Best case ...... Wire harnes plug on the back of the instrument cluster is loose or has dirty contacts.

worse...... faulty circut board in instrument cluster , ( cracked , burnt etc.)

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1 Answer

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