abs light on, speedo doesnt work? - Ford Powerstroke Diesel Forum
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Old 12-20-2009, 08:53 AM
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abs light on, speedo doesnt work?

any help would be greatly appreciated!!!!! just recently the abs light came on, speedo stopped working, and the od light started flashing. after running a while the light goes off and everything goes back to normal. hooked my code reader up, says no codes present. early 99
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Old 12-20-2009, 09:48 AM
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Speed sensor on the rear axle on top of the pumpkin.
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Old 12-20-2009, 10:20 AM
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Quote:
Originally Posted by 99PSD-White View Post
Speed sensor on the rear axle on top of the pumpkin.
Thats where I would start looking. Might make sure its connected or change it out.
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Old 12-20-2009, 10:30 AM
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if you unplug it(bad connections), I think the speedo would still work but the abs light would be on.I tried unplugging the abs on my excursion to diagnose brake issues. I had the light but speedo still worked.
When i unplugged the fuse i had the abs light on and no speedo? maybe this will help diagnose
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Old 12-20-2009, 01:50 PM
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What are you using to scan for codes? If the OD light is on there is a stored powertrain code. Most common is the VSS, but I would have the code read first.
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Old 12-20-2009, 03:39 PM
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I would change the sensor on top of the pumpkin. Not expensive. Easy to do. Had the same "type" of issue and the sensor resolved it.
Good luck.
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Old 12-20-2009, 04:27 PM
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I had a similar problem but without the od light and the speedo my abs light just staying on put a new sensor in the pumkin and now the light is intermitten some help would be nice someone said the gear that the sensor reads could be bad and that meansa new rear end. Please help i bought my sensor from Ford
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Old 12-20-2009, 05:02 PM
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the od light doesnt stay on, just flashes after driven a while. no bad fuses as well, i checked all of those. weird part is that after a while of driving or idling everything will come back to normal until the vehicle is shut off. then it starts all over again
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Old 12-20-2009, 05:02 PM
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btw oreily auto parts has the sensor in stock for $22
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Old 12-21-2009, 04:40 AM
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If the light came on, even for a few seconds there is a stored code that will remain in the puter until the codes are cleared. You have to use the right scan tool, our trucks are not OBDII compliant so the free scans at Auto Zone ain't going to read it. If you live close to me I will scan it for you.
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