Question about 1999 Ford Taurus

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Tachometer failing. Instrument panel short?

The tachometer on my 1999 Taurus SE is intermitantly failing. It will begin to work when the engine is cranked over (sometimes) and soon after driving the needle will fall to the "0" poisition or all the way to the right. The RPM's don't race, the tach just fails. There is also a dash light out behind the instrument panel. We had to disconnect the radio because it was killing the battery. Short in the dash?

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  • Ford Master
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A 'short' means a blown fuse at least or smoke. I would replace the blown bulb and check the connectors.

Posted on Jul 24, 2017


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Posted on Jan 02, 2017

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SOURCE: i bought a tachometer and

tach signal can be tapped either from the vehicles ecm or the ignition coil itself

Posted on Nov 16, 2008

  • 1 Answer

SOURCE: The tachometer and the gauges on the left of the tach don't work

I have the same truck.   The instrument cluster is a sealed unit that is not repairable by mere mortals.   You might want to check the large plug-in connector on the back and see if it is partailly out, although that's not likely.  More likely is that there is an electrical short in the cluster, and it will have to be repaired.  Your dealer can send it out, or there are a couple of independent shops that you can find on the web to send it to.   I lost the LED's in mine and had to send it out.   It's really easy to get out - just pop off the front trim that goes around the instruments and the radio/climate control and take out the couple of screws that hold it in.  Make sure you disconnect the battery first.   Also, it's easier to get out the trim if you start er up, keep your foot on the brakes, put the shift level all the way down to the right, then shut the truck off.    Hope this helps.  > Joe

Posted on Mar 11, 2009

  • 1170 Answers

SOURCE: My bmw 318is instrument cluster doesnt work

The fuse must have blown off. Replace the fuse.

Posted on Mar 24, 2009

  • 1 Answer

SOURCE: I am trying to install an Autometer Tachometer in a 93 Nissan D21

the signal wire is coming from the distributor under the hood run the wire through the fire wall to that wire and as 4 the wire that lights up the tach piggyback that wire off of the cigarette lighter on the fuse box

Posted on Jul 17, 2009

  • 1486 Answers

SOURCE: My 2003 Saturn Vue instrument panel stopped

The plug at the back of the panel has come lose.Remove the dash panel and push plug on firmly.Hope that was helpfull.

Posted on Aug 08, 2009

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Where can i find the rpm sensor on a 2001 ford ranger

There is no tach - rpm sensor . This information comes from the PCM - engine computer .
The tachometer is a 6,000 rpm tachometer. It has four terminals labeled "B" (12 to 14.5V), "S" (EDIS tach signal in), and two "G" (cylinder selection grounds). The top ground (G) terminal is open on a 4-cylinder engine vehicle, and is grounded on a 6-cylinder engine vehicle.

  • The tachometer is inoperative
  • Powertrain control module (PCM).
  • Circuitry.
  • Tachometer.
  • Instrument cluster printed circuit.
  • Go To Pinpoint Test F .
  • Incorrect tachometer indication
  • Circuitry.
  • Instrument cluster printed circuit.
  • Tachometer.
  • Go To Pinpoint Test G .

Measure the resistance between the instrument cluster C220c pin 8, circuit 398 (BK/YE), harness side and ground.
  • Is the resistance less than 5 ohms?
Yes GO to G2 .

No REPAIR the circuit. TEST the system for normal operation.
Measure the resistance between the tachometer and the instrument cluster printed circuit terminals; refer to the following chart:
    Instrument Cluster Printed Circuit Terminal Tachometer Terminal C220a pin 13 C220a pin 15 S C220b pin 2 G C220c pin 8 G (6 CYL.)

  • Are the resistances less than 5 ohms?
Yes GO to G3 .

No INSTALL a new instrument cluster printed circuit. REFER to Instrument Cluster Printed Circuit in this section. TEST the system for normal operation. G3 CHECK FOR CLEAN TACH OUT (CTO) CIRCUIT OPEN OR SHORT Check for CTO circuit open or short. Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual.
  • Is the CTO circuit OK?
Yes INSTALL a new tachometer. REFER to Gauges in this section. TEST the system for normal operation.

No GO to G4 .
G4 CHECK FOR CORRECT PCM OPERATION Disconnect all PCM connectors. Check for:
  • corrosion
  • pushed-out pins
Connect all PCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present.
  • Is the concern still present?
Yes INSTALL a new PCM. REFER to Section 303-14 . CLEAR the DTCs. REPEAT the PCM self-test.

No The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
Your best bet mite be to take it to a qualified repair shop.

Jan 12, 2018 | Ford Cars & Trucks

1 Answer

Tachometer not working fuses good ware dose tachometer get its siginal

From the ECM - engine computer ! Suggest you take this to a ASE certified repair shop or the Chevy dealer an have it diagnosed ! Could be the gauge itself .Looking at fuse's is no good ,there is not a fuse just for the Tachometer .
The engine control module (ECM) creates the engine speed signal. The engine speed is sent to the IPC over a discreet wire from the ECM. The instrument panel cluster (IPC) converts the signal to a tachometer position indicating the engine speed.

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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)
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)
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
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
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
Replace the I/P Cluster. Refer to Instrument Cluster Replacement .
Is the repair complete?
Refer to Instrument Cluster System Check
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

Im trying to instal my tach on my 99 hyundai accent hatchback witch wire on the coil that i connect too

The "Green" wire from the after-market tachometer will connect to the (-) negative side of the ignition coil.

The "Red" wire from the tachometer will connect to an ignition source that has power only when the key is in the "Run" and "Start" position, usually at a "IGN" source on the fuse panel.

The "Yellow" or "White" wire from the tachometer will connect to the instrument panel lighting fuse in the fuse panel usually marked "LPS" or "IP" and there should be a source next to the instrument panel lighting fuse to connect the wire.

The "Black" wire should be connected to a good body ground, and if the tachometer is not properly grounded anyone sitting in the vehicle while the engine is running will receive a mild electric shock from the ignition coil primary voltage whenever anything metal inside of the vehicle is touched.

Nov 05, 2010 | 1999 Hyundai Accent

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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


Sep 27, 2010 | Chevrolet Silverado 1500 Cars & Trucks

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Tachometer dpes not operate 35000 miles

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please rate highly if this helps.

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

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