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My tachometer works sporadically. Where should I look for the problem?

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  • Toyota Master
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Find cable on transmission and see if it is loose.

Posted on Nov 02, 2012

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emissionwiz
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SOURCE: speedometer and tachometer

Both are in need of repair, nothing else will cause this kind of problem except the inner electronics of both instruments, they can be repaired by any authorized Hyundai electronics repair station, but it won't e cheap.

Posted on Nov 18, 2008

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1 Answer

Tachometer not working


bad tachometer or sensor, nothing to be concerned about if you don't mind the pack not working

Feb 25, 2015 | 2005 Hyundai Santa Fe

1 Answer

2002 nissan sentra SE-R tachometer is sporadic


need some more info is it manual or automatic. diesel or petrol, and engine cc. if auto it can be the signal is not getting to all locations as engine speed goes to auto box first then out of auto box a can go to other devices that need speed signal then to the dash. its the same for manual engines but no signal goes to the auto box control also a bad earth or bad plug on the cam/crank sensor can cause this.

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My 2004 Dodge Caravan Tachometer stopped working


have you checked the fuses? it more than likely blew a fuse if not then maybe fried wiring from jump start.

Feb 24, 2013 | 2004 Dodge Caravan

1 Answer

My Tachometer works ,but my speedometer doesnt ? In mornings when cold it hesitates and misses, once it warms up it does great. Why ?


The hesitates and misses is probably a chock problem, especially since when it warms up, it does great.

Since you weren't very specific on your indications, I thought a general troubleshooting guide might be helpful to you. But you might want to look on ebay for a shop maintenance manual for your vehicle if you plan on keeping it for awhile and doing your own maintenance.

This answer is applicable for many BMWs in addition to the one listed below.

Q

The tach and speedo work most of the time, but sometimes work sporadically.


A
Here is a write-up on the initial steps in tracking down a speedometer and/or tachometer problem.
Applies to: E23, E24, E28, E30, E32, E34 with speed sensor units mounted in the differential housing cover.

1) Speedometer - The speed sensor may be faulty. The sensor is mounted in the differential cover. Remove the harness plug and remove the sensor. Clean the sensor and measure the resistance (should be 0.0 Ohms). If there is any resistance higher than 0.0 (zero Ohms), replace the sensor. If the resistance reads correct, reinstall the sensor.

2) The wiring at the connector plug for the speed sensor (in the differential housing) may be faulty and corroded .... pull the boot back from the plug housing and inspect the wires and the pins.

3) The actual speedometer and/or tachometer head may be faulty. It may have a loose connection within it or a cracked circuit board.

4) The speedometer or tachometer head may be loose on the main instrument circuit board (do the gauges change or move if you smack the top of the dash, above the gauges?). Remove the instrument cluster and check the mounting of the speedometer/tachometer to the circuit board. See the attached issues of our Fast Times newsletter for assistance in removing the instrument cluster, on E30 3-series models (see the articles on replacing the PC board and replacing the odometer gears for info on the removal of the instrument cluster).

Fall 2005 Fast Times Winter 2004/2005 Fast Times
DIY E30 PC Boards DIY Odometer Repair

2005_n405_newsletter.gif 2005_n105_newsletter.gif

5) The plug that carries the impulse signal into the instrument cluster may have loose contacts. The plug for the speedometer signal is located on the driver's side of the back of the instrument cluster (on the E30 chassis). If you remove the lower dash trim panel (the one above the driver's knees), you can reach up and touch the plug. It is in a vertical position and has up to 26 wires in it. If you wiggle the plug, while driving, and the speedo comes & goes, you have loose contacts in the plug connection.

6) You may have a problem with the service interval PC board and it's NiCad batteries. If your oil change and service interval lights can not be reset (or will not stay reset for an appropriate time period), the PC board is likely faulty. This can affect the various gauges, including the speedometer and tachometer. If the PC board is faulty, I would suggest replacing it (after checking the other areas noted above). See the attached Fast Times newsletter article on replacing the service interval PC board.

In your specific case, I would suspect that you need to replace the service interval PC-board, if your service reminder lights can not be reset or do not stay reset.

Jun 02, 2011 | 1997 BMW 7 Series

1 Answer

Tachometer dpes not operate 35000 miles


Common issue with the 04-05 Impala instrument clusters. It's caused by a failing stepper motor on the cluster's circuit board behind the tachometer but it can be fixed. Check this page for more about it and how to get it fixed - Impala tachometer does not work

May 28, 2010 | 2005 Chevrolet Impala

1 Answer

How to install tachometer in a 1984 chevy Blazer


Ok if you have a tachometer with 2 cables the positive must be connected to the ignition and the negative tachometer what conectaras the negative coil that way you worked well the tachometer

Mar 18, 2010 | 1984 Chevrolet Blazer

1 Answer

Non fuctioning tachometer


hi im sure youve been asked this.
i have to ask as the year of the.
does it have a speedo cable, which is what sounds is wrong.
or a v.s.s
get back to me so ican tell where to go from here.

Aug 17, 2009 | 1997 Honda Prelude

4 Answers

Some times my 1995 mustang gt 5.0 wont statr.ill let it sit for an hour then it always fires right up.


This could be the stator sensor inside your distributor. This is a common problem with 1994 - 1995 Mustang GT's. Did you ever notice your tachometer behave sporadically? Does the car ever stall while driving? These are two symptoms of that problem.

Jul 17, 2009 | 1995 Ford Mustang

2 Answers

Tachometer is not working


please rate highly if this helps.

Check fuse #37, 10 amp yellow in fuse panel on dash.

The camshaft sensor in the distributor sends the tach signal to the instrument cluster. wire is BU = Blue?

go here for villager help

http://autos.groups.yahoo.com/group/villagerquest/

Mar 29, 2009 | 1999 Mercury Villager

1 Answer

Speedometer and tachometer


Both are in need of repair, nothing else will cause this kind of problem except the inner electronics of both instruments, they can be repaired by any authorized Hyundai electronics repair station, but it won't e cheap.

Nov 18, 2008 | 2002 Hyundai Santa Fe

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