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MuscleCar_Crazy 07-18-2011 10:32 PM

My odometer goes on and off?
I've notice that my odometer on my '02 mustang has been going on and off at anytime. I started to see this when my car reached 90K. I also have a '99 F-150 that stared when it reached 90K also now has 102k. Has anyone else had this problem with any mustangs out there?:headscratch:

wmburns 07-18-2011 11:22 PM

For the 1999-2004 model year confirm fuses F2.21, F2.34, F2.5, and F2.37 are good and have power.

1999-2004 MY fuse panel schedule:

Check the ground behind the center console. It is shared by a number of devices including the radio, GEM, cluster, ODB2 port. It's frequently messed up during a radio install.

Follow the multiple black wires from the radio is one way to find the ground.

Another option is to test the ground wires at the cluster connector. Look for the black wires and the black wires with a white stripe. Again best to use a test light that will "load" the circuit.

Note, testing a ground with a VOM may work if the ground is open. However the VOM method want be able to tell a good ground from a "weak" ground. Again the best method is to use a test light that will apply a measured "load" to the circuit.

Or use the voltage drop method.

Howto perform charging system voltage drop test

MuscleCar_Crazy 07-20-2011 10:28 PM

I don't have a aftermarket radio in my mustang or truck. when I got my car the radio did go out and was replace under warranty. unless the wire is loose somewhere??

wmburns 07-21-2011 07:57 PM

how to fix intermittent cluster foil trace repair 1999-2004
Also possible this is a bad cluster printed circuit foil trace or bad solder joint. Check out:

Intermittent Odometer - A Repair - F150online Forums

Courtesy of Suek here's how to calibrate for a needle swap.

How to recalibrate your gauges - New York Mustangs - Forums

There are also companies such as United Speedometer and Electric that will perform "bench repairs". I have used their service before and have had good results.

MuscleCar_Crazy 07-22-2011 11:08 PM

I read over that forum, it was very helpfull and easy to understand. I'm going to try that out when I get some time. Thanks for finding that form me.

tommbstone 06-20-2012 01:28 PM

Is this ground wire also behind the radio on my 99 mustang? I think my on and off odometer is probably on the back of the cluster. I've never pulled it before but that sounds most likely.

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