Truspeed wire location - Ford Powerstroke Diesel Forum
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Old 02-15-2012, 07:53 PM
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Truspeed wire location

I have a Truspeed speedo correction box and I'm having a heck of a time locating the black/grey wire to splice in to. Supposedly it is at the ABS connector under the hod. Does anyone have a picture of it? Thanks
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Old 02-16-2012, 08:18 AM
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Anyone????
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Old 02-17-2012, 04:47 AM
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No photo, but it should be in the connector near the wiper motor.
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Old 02-17-2012, 05:00 AM
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More info- should be in connector C135 (ABS module) pin 21 located on the ABS control module. According to the drawing I have, it goes into the wiper motor harness pin 4, as well as the 4x4 control module pin 3 and the radio harness pin 14. It is circuit 679.

Good Luck!
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Old 02-27-2012, 10:11 PM
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I'm having difficulties locating this wire as well... I pulled my air box and battery out on Saturday thinking it would be at the abs unit (behind driver side headlight), no go.. I found the detailed instructions online somewhere with pictures detailing the procedure but you really cant figure out where they unplug the wiring harness that has the black/gray from..
I must have starred at the engine bay for 30 minutes waiting for this wire to jump out at me.. I even went and picked up a Haynes repair manual, that was even more useless than my daughters Dora the explorer coloring book, LOL.

So if someone has a nice picture of the right side of the engine bay, with maybe a BIG arrow pointing to the harness to unplug, that would be awesome!!

Thanks!
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Old 02-27-2012, 10:51 PM
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UPDATE:
I just located the wire that we need to tap into. When I had everything apart, I found the ABS unit I didn't realize that this bunch of wires that run along side of the fender wall/splash guard were it.
Follow the Wizards instruction as he is taping into the same black/gray wire.

http://www.fmdkinc.com/Speed%20Wiz/s...04-install.pdf

since yours is an 06, you may need this link instead,
http://www.fmdkinc.com/Speed%20Wiz/05-08.pdf

I hope it helps ya out buddy, I'm taking mine apart tomorrow to see if I can get mine completed... Good luck!

Last edited by primetime1267; 02-27-2012 at 10:55 PM.
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Old 03-15-2012, 10:53 AM
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Quote:
Originally Posted by primetime1267 View Post
UPDATE:
I just located the wire that we need to tap into. When I had everything apart, I found the ABS unit I didn't realize that this bunch of wires that run along side of the fender wall/splash guard were it.
Follow the Wizards instruction as he is taping into the same black/gray wire.

http://www.fmdkinc.com/Speed%20Wiz/s...04-install.pdf

since yours is an 06, you may need this link instead,
http://www.fmdkinc.com/Speed%20Wiz/05-08.pdf

I hope it helps ya out buddy, I'm taking mine apart tomorrow to see if I can get mine completed... Good luck!
Primetime did you get yours installed? When you calibrated the speedo did you use the charts to calculate the amount of turns or did you use the GPS to set the truspeed?
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Old 03-15-2012, 10:59 AM
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Mine is about perfect, it is off by like 3/4 to a mile off. I'm satisfied to say the least. Use their charts to get you in range and then do 1/4 turns .. use a true gps and a cell phone app gps. I think my truck ahifts better now also, even though people say it doesn't effect it, it did for me.
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Old 03-15-2012, 11:01 AM
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Sorry for all the questions but which chart did you use? The tire size chart or the gear ratio chart. Nice truck by the way.
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Old 03-15-2012, 11:09 AM
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I used the tire chart since i have stock gears. Thanks !! I love the truck so far.
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