Speedo Calibration
 

Guys,

I have a newbe question.

Can you calibrate the speedo on the F150 ?

On my 97 F250, I could ground a certain plug, and use the ignition and the select / reset button to access the speedo codes and change it for the tire size I was running.

Just wondering if I could do this on the F150.

Steve

2001 F150 XLT ExCab 4x4

That's a neat trick, i've never heard of it being done on an f-150 so i'm not sure if you can. Superlift makes a calibration device called Truspeed that will allow you to recalibrate for different tires and gear ratio's. Truspeed has a way to change the calibration electronically so i would imagine you could do it by hand if you knew the right wires.

Anybody??

-Jon

SCain,

The earlier Ford trucks used that method. Don't know of anyone on our boards who's tried it with the 99+, and this isn't a recommendation.
------------------------------------------------------------------------
Quote from 80-96 boards:
"You need to recalibrate your speedo using this process:
80-96 - Speedometer Calibration
Start with 20186, divide by actual tire size in inches. Divide again by 66.66
Example: 20186/34.5=585.1/66.66=8.78
Thus for 34.5 inch tires, the calibration is 878
To set the calibration, ground the single wire connector under the glove
box, hold in reset button on trip meter and turn ignition to ON. From here
use Select to get proper calibration and press reset to store
This can ONLY be done 6 times before you have to replace the module.
Keep in mind that you must use actual tire size, not printed size."
--------------------------------------------------------------------------

http://www.ford-trucks.com/archives/..._v03.n335.html

I had the speedo re-calibrated on my 99 F150 when I had bigger tires installed. I had to have the dealer do the re-cal in the computer. If you search for speedo calibration you should be able to find my original posts.

Good Luck

Michael