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Discussion Starter #1
Where is the sensor for the speedometer? It's not working and I have some dumby lights on the cluster.. Thanks!

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rear axle on top / does ABS also 1 bolt 10 or 13 mm I think
pull and clean it's called a VSS = Vehicle Speed Sensor
 

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I replaced that but it still doesn't work.

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Discussion Starter #4
That's the abs sensor, not the vss. Any help please

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Yeah it's a Turbo Diesel
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Idk about these trucks, but on Chevys the vss is in the Trans tail housing


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You have an output shaft speed sensor on the top of the tailhouse on the transmission. If it fails though, you should get a code P0720. If you aren't getting any codes, makes me wonder if it isn't a problem with your cluster. May be cheap enough just to swap that out to see. I am not sure which of the two, OSS or the VSS sends the speedometer signal of the top of my head.

**EDIT** looks like the axle sensor they are calling a wheel speed sensor, so I think an assumption that the OSS would be the one to send a signal that will feed the speedometer, but like I say....when it fails, you should be getting a code...
 

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no I was asking because I have never heard of it LOL

what manual ?
Its all good. :beer: The Ford Service Manual.....the one from Ford......a user here posted a link to download a version of it....search for service manual....by far the most beneficial troubleshooting manual you will ever find....by very far....
 

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I probably have it downloaded somewhere already LOL I was so disgusted with All Data and Mitchels online ,,
I bought the Ford OEM paper versions

but never miss a free download
 
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