ABS Light is on and Speedo Problem - Ford Powerstroke Diesel Forum
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Old 09-29-2011, 06:41 PM
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ABS Light is on and Speedo Problem

I have a 99 F250 Super Duty 7.3L, with Manual Trans, recently the ABS light came on and stays on. Also, my speedometer only starts to work once i reach a speed of about 30 or 35 mph. What should i check first?
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Old 09-30-2011, 03:35 AM
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You need to have truck scanned for codes. The FREE scans won't work as our trucks are not OBD II compliant. My bet is on VSS on rear diff, $30 and 5 min to replace. 8mm socket or wrench to remove old sensor. If you are close to me I will scan it for FREE.
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Old 09-30-2011, 03:36 AM
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Barstow CA , to far for me to go sorry?
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Old 09-30-2011, 03:56 AM
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If it isn't your vss I would be surprised. My 03 ate 2 and my 06 ate one. Actually on the 06, same exact symptom you are describing!!!!
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Old 09-30-2011, 07:12 AM
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Thanks for the info. I'll check out the VSS (i'm assuming this is the vehicle speed sensor on the rear diff).
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Old 09-30-2011, 07:32 AM
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Had my sensor replaced as well.

Peter
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Old 09-30-2011, 08:28 AM
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Quote:
Originally Posted by Galaxie View Post
If it isn't your vss I would be surprised. My 03 ate 2 and my 06 ate one. Actually on the 06, same exact symptom you are describing!!!!
Nice Avatar pic!!

Quote:
Originally Posted by cedave View Post
Thanks for the info. I'll check out the VSS (i'm assuming this is the vehicle speed sensor on the rear diff).
Yes, Vehicle Speed Sensor on the rear diff. I have a brand new one from Ford in my garage for a spare.
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Old 09-30-2011, 01:59 PM
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Well $15 later (Autozone) and problem fixed. You guys were right on the money, it was the rear ABS brake sensor, as the folks at Autozone refered to it as.
Anyway, thanks again for the advice and the fix.

Oh, and Galaxie, I too enjoyed your avatar!!!!!!!!!!
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