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Old 06-06-2006
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Rear ABS / Speedometor

I've been having some trouble with these two problems for some time now, with no solution. I have also searched around on RPS. A couple people on there couldnt figure out theirs either. I have searched around online and have found that these two problems are caused by the same thing.

1. My ABS light comes on and turns itself off occasionally and clicks while braking, sometimes making it almost impossible to stop where i want it.

2. My speedometor is erratic, sometimes dropping to 0 and other times jumping back up to my actual speed. Other times it will just float around in the middle. Which is really annoying because it doesnt calculate my odometor accuratley.

I've tried fixing these problems by replacing the ABS/Speed sensor on the rear axel, to no avail. (Part number ABS530780).

I have also tried cleaning the connector underneath the drivers seat. This still did not solve my problem.

1999 Ranger 2wd / M5OD / 2.5ltr.
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Old 06-06-2006
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You used electrical contact cleaner right? I had the ABS light and clicking, sometimes the speedo would do wierd things too.. I completely soaked the pins on the inside of that connector underneath the drivers seat with the cleaner, let it sit for a few minutes, put it back together (make sure you get it all the way on) and it solved the problem. That seems to be a common problem with 98-00 rangers so it seems. Hope you get it figured out
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Old 06-06-2006
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I agree with the above. The only addition I would make would be to pack some dielectric grease in that connector after cleaning it. That should help keep the water out and might prevent further corrosion and future problems.
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Old 06-06-2006
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Since i didn't have anything to apply to it, the only thing i had around the house was a can of air. So i had sprayed that into it. But i will have to try electrical contact cleaner and dielectric grease.
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Old 06-07-2006
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Be sure to inspect the individual pins to see if they are corroded and need to be cleaned up. On rare occasion, Rangers used in the Rust Belt have had pins in that connector completely corrode away.
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Old 06-07-2006
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if im not mistaken, there is also a ABS Solenoid. Which my dealership has replaced 2x so far. tho, my speedo is pretty accurate, but man, "they claim" ABS isnt supposed to allow u to lock your wheels? HA! Personally, I think they should make ABS an option, not "u have to use it" I hate ABS.
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Old 06-07-2006
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Quote:
Originally Posted by FMD
if im not mistaken, there is also a ABS Solenoid. Which my dealership has replaced 2x so far. tho, my speedo is pretty accurate
Your situation is different, Dave. The pulse for your speedometer originates at the OSS sensor on the transmission. Diabolic's truck falls into the 98~2000 range which uses the ABS sensor on the rear axle to also provide the the speedometer pulse.
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Old 06-07-2006
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So i cleaned the plugs with electrical cleaner, waited 3-4 minutes, then put one drop of dielectric grease over each one of the holes for the plugs. Still the same problem. Next?
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Old 06-07-2006
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You may have to find somebody with an ABS code scanner(doesnt matter if it's on occasionally), thats how I found out about my little problem.. hope you find out the problem
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Old 06-07-2006
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Should i have bought my speed/abs sensor from ford instead of a 10 dollar version from western auto?
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Old 06-07-2006
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Here are some possible causes as I see them:

Bad ABS/VS sensor - good possibility but already changed
Tone ring problem - possible but not likely
Bad Module (4WABS or GEM) - possible but not likely
Bad Speedometer - possible but not likely
Poor wire connection - good possibility

One thing we need to know is if your truck has 4WABS or RABS. Both were available in 99 but the wiring is different. With a 4-cylinder/manual truck, my guess is that it is less likely to have the optional 4WABS. Not sure, though.
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Old 06-07-2006
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My fiance keeps insisting that it is the sport trac cluster that i installed a year ago. I have been having this problem for about a month. Doesnt quite add up.

EDIT: Which wires should i check and where?

Last edited by Diabolic; 06-07-2006 at 11:35 PM.
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Old 06-07-2006
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Do you have RABS or 4WABS? The wiring is different.
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Old 06-07-2006
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Not sure. How would i find out.
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Old 06-08-2006
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RABS is rear ABS only. 4WABS is for all 4 wheels.

You can look at the front spindles to see if you have the wires to the front ABS sensors. No wires means that you have RABS.
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Old 06-08-2006
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or... you can look in your owners manual under ABS fuses and see if the 4WABS fuse is there, if not, then you have RABS (likely that you have that as does my truck- and it's an XLT)
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Old 06-08-2006
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The cluster has nothing to do with the ABS system. It's only a read-out of functionality.

I have a 2000 4-cylinder and it has RWABS. I'd recommend getting a VSS from a junkyard and trying an OEM part in place of your "Western Auto" replacement. That's the only likely cause of these symptoms, other than a sporadic ground short in the wiring, or a bad connection at either the sensor, the harness under the driver's seat, or the module behind the radio in the dash.
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Old 06-08-2006
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Okay, sensor from Ford did NOT work.
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Old 06-08-2006
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Have you checked the ABS module that's located behind the radio bezel? It has a wire harness, maybe 2, that could be loose or corroded. I'll see if I can find a diagram of it's location...
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Old 06-11-2006
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Quote:
Originally Posted by rwenzing
RABS is rear ABS only. 4WABS is for all 4 wheels.

You can look at the front spindles to see if you have the wires to the front ABS sensors. No wires means that you have RABS.

No wires in the front so i have RABS. Although the clicking does sound like it's coming from the front if it makes any difference.
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Old 06-11-2006
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Quote:
Originally Posted by Needforspeed3685
Have you checked the ABS module that's located behind the radio bezel? It has a wire harness, maybe 2, that could be loose or corroded. I'll see if I can find a diagram of it's location...
Diagram?
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Old 06-12-2006
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