Question about 1989 Volkswagen Jetta 2 Door

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1989 VW Jetta deisel tach.

I have installed a different gauge cluster from another car with a gas motor. The new cluster has a tach the old one didn't. How do I make the tach operate?

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You can't, the tach from the gas car reads a signal from the ignition system. Your diesel has no ignition system at all, no can do.

Posted on Sep 11, 2008

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My 2000 Chevy s15 Rpm and Gas Gauge is not working


I didn't see an s15 in that model year, in my database?
If the speedometer works but the tach doesn't, I think something is wrong with instrument cluster?
GM has had a problem with fuel gage sending units. The sending units are not hard wired to instrument cluster, they send signal to pcm, the pcm sends serial data to instrument cluster, telling the cluster the gage settings.
It may be possible to use different size resistors in place of the fuel level sending unit, to see if fuel gage reacts properly to different resistors, if the gage reacts properly, then I think the problem is the fuel gage sending unit.

Nov 02, 2016 | Chevrolet Cars & Trucks

1 Answer

Gmc problems


If you replaced the cluster, the tach was replaced. So its probably not a problem with both the old and new tach. Its probably a problem in the wiring to the tach. Put a multimeter across the tach signal wires on AC setting, rev the car, does the meter reading change?

Dec 21, 2013 | Cars & Trucks

1 Answer

No gauges or speedodometer or tach working


GM had gauge cluster problems from 2000-2005. Bad stepper motors. On those units you have to replace the cluster or rebuild it with new stepper motors. Dealership fixed mine for $150.00

Jan 05, 2011 | 2003 GMC Sierra 1500

1 Answer

Started with fuel gauge now oil pres. gauge , sometimes tach , these gauges bury themselves around clockwise and don't read properly. Sometimes at highway speed say 50mph the tach is reading 6000rpm, gas...


The gauges in the cluster are driven by stepper motors, these are known to fail. There are vendors on E-bay that offer services to replace the stepper motors. This would require you to remove the cluster from the truck.

Dec 31, 2010 | 2004 GMC Envoy

2 Answers

Gas gauge and tach do not read proper readings! What will cause this? The gas guage will peg past full when there is only quarter tank and tach reads 4500 RPM at idle


The gas tank sounds like a bad ground usually located under the car at the gas tank. I do not know but maybe they both tach and fuel gague get their ground from the same place.

Dec 26, 2010 | 2004 Chevrolet Monte Carlo

1 Answer

The cluster wont work and it is a new cluster and the fuse is good whats wrong


You don't say why you need to replace the cluster in the first place.

I assume your problem is that the new tacho does not work.

The 89-94 Talons have clusters that look the same. HOWEVER ...

89-91 cluster tachs expect -ive ign pulses, while 92-94 expect +ive pulses (or vice-versa, if forget) . The reason is different ign pulse circuits on the engine.

Hence a 91 cluster tach and the boost gauge won't function in a 93 unless the polarity issue is addressed. It's possible to mix and match parts from your old cluster and the new one. Fiddly but doable.

You may find more info and assistance on www.lancerproject.ca

Dec 23, 2010 | 1993 Eagle Talon

1 Answer

Gas gauge constantly on empty, check engine light not on,


Problem can be one of two things, a bad sending unit in the gas tank or a defective stepper motor in the instrument cluster. All gauges, speedo and tach are driven by stepper motor that have been known to fail. A technician using a scan tool can determine if the tank sending unit is working.

Sep 04, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

I have an 1983 olds cutlass and the guage cluster is not working properly the oil temp and gas is not readind but the tach speedometer and battery is what could be the problem


Worn out gauges would be the first guess. The next would be the oil pressure sensor....

The gas gauge could have problems from a bad float in the gas tank or the wires to the sending unit are badly deteriorated.

Dec 01, 2009 | 1983 Oldsmobile Cutlass Supreme

3 Answers

Tachometer gauge


your relay is going bad, replace it.

Nov 24, 2008 | 2004 Chevrolet TrailBlazer

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