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Rear ABS Module VSS Speedometer

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Old Oct 30, 2010 | 07:18 AM
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Rear ABS Module VSS Speedometer

My speedometer was not functioning properly at highway speed. After replacing the VSS I decided to unplug the RABS module. Its been disconnected for two weeks now and the speedometer works great.

I picked up a used module on Ebay for only a couple bucks. Its from a 95 as well, but has a slightly different part number and the case is plastic. Mine has a metal case.

I installed the one I got from Ebay, but havent driven the truck yet. I'm wondering if it will cause issues. How many different modules are there and what is interchangable?
 
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Old Oct 31, 2010 | 04:23 AM
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Well, I tried the new used module tonight and it was only slightly better than the original one. I guess I am going to buy a remanufactured one. I wish I could find a new one.

What is it about this module that causes an erratic speedo? Also, If I get a remanufactured one and the problem is still there what should I look at?
 
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Old Oct 31, 2010 | 02:12 PM
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I think i remember reading here some time ago that if unplugging the RABS module corrected a speedo problem then it indicated a bad PSOM.
 
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Old Nov 1, 2010 | 07:04 AM
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I have a nearly new PSOM. It also did it with my old one. I hope thats not the case. I have a low mileage mint condition Lightning instrument cluster. I'm not saying your not right, but I don't really see how that could be.

With the new used RABS module the speedo issue is not as pronounced but begins at a lower speed.
 
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Old Nov 1, 2010 | 07:46 AM
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https://www.ford-trucks.com/forums/9...gear-e40d.html Ok I was wrong. Read the first post by subford in this link.
Seems like your second RABS module is also bad.
As far as getting a new ECM is concerned I think rockauto.com has them.
 
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Old Nov 1, 2010 | 08:37 AM
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Thanks for the link. I should have done a more thorough search. As always Subford comes through with great info.

I guess I'll be getting a new remanufactured ABS unit. Maybe Rock Auto has a new one.
 
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Old Nov 1, 2010 | 01:17 PM
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Checked rockauto, reman only for $80-$90 plus core.
 
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Old Nov 2, 2010 | 03:17 AM
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Thats about the same price I have been seeing them listed for.
 
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Old Nov 2, 2010 | 03:34 AM
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Why get a new/rebuilt one at all? What's wrong with leaving it unplugged? I've had mine unplugged for around 6 months I think. No ill effects.
 
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Old Nov 2, 2010 | 04:17 AM
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I know it works fine, but I really want to have ABS for when the roads are icy in the winter here, or just for when it rains. With all the poor drivers around here, I'd feel better.
 
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Old Nov 3, 2010 | 10:26 AM
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I just bought a new Borg Warner BWD one from Orielly, and its just as bad or worse than ever. I'm pretty damn irritated with it right now!
 
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Old Nov 3, 2010 | 10:29 AM
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There, see, now my "just leave it unplugged" method looks good now doesn't it
 
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Old Nov 3, 2010 | 10:37 AM
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Its been that way for a while now. I just want the ABS to work especially during the winter. It actually helped several times over the years.
 
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Old Nov 3, 2010 | 10:42 AM
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this is the first vehicle I've owned with any abs, so for me having it unplugged isn't a big deal.
 
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Old Nov 3, 2010 | 11:10 AM
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My other vehicles didn't have it either, but its nice when the roads are icy. The rest of the time its not that important.
 
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