[tomm99]

My 2005 mustang GT tach has stoped working; it got stuck for a day and then started working, however it was starting on the wrong RPM (starting on 2 instead of 1).

 

[SLNT JKR]

U can replace the motor on it there is a YouTube video of a guy who did it. I don't have it ATM. But its easy to do if u can sodder.

Sent from my VivoW

 

[SLNT JKR]

http://www.youtube.com/watch?v=EgqAoQFCu0A&feature=youtube_gdata_player

Sent from my VivoW

 

[Rhetrax]

I agree, sounds like the motor is dying or has shorted out, or that the sensor has become disconnected or is also failing. I'd say replace the motor, if that doesn't work, try checking the sensor.

 

[mustang78248]

The tach may be the first gauge to go, but the temp gauge is also very prone to failure. Eventually they may all go haywire.

The stepper motors are available on eBay for about $7-8 each, and you need six for the entire cluster. It requires your patience and a little skill with a soldering iron, but its not difficult if you just take your time.

I used a different process than in the video above to remove and replace the needles, but it worked out the same. I found the information on removing and replacing the needles in the documentation for a Simco white gauge cluster overlay.

In general, there are no sensors directly connected to the gauge cluster in the 2005-2010 Mustangs. The sensors report readings to the computer and the computer drives the gauges. If you want to verify the actual readings you can use an OBDII scan tool to read everything right off the maintenance port under the dash. This will tell you what is coming from the sensors.

Bruce

 

[tomm99]

thanks for the help it was the motor, i just replaced it and all is back to normal.