ABS light on and won't shift??? 97 F350 PSD - Ford Powerstroke Diesel Forum
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Old 06-29-2010, 05:41 PM
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ABS light on and won't shift??? 97 F350 PSD

My stupid dog chewed the wires going into the ABS sensor on top of the rear diff.
I didn't know and drove it...horrible! Wouldn't shift o/d light flashing. When it finally shifted from me standing on the gas it was so hard I thought the trans was going to fall out.
Got home found the chewed wires and replaced as well as the ABS sensor
Still no luck...Scanned it and it thru abs code..I cleared it...still no luck
Dissconnected batteries overnight...still no luck

Any ideas???
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Old 06-29-2010, 05:53 PM
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Drive it a few miles if you haven't already . My rear abs sensor went bad and after I replaced it I had to drive it about 5 miles before it went off .
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Old 06-30-2010, 06:16 PM
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I disconnected the bat. cables today and cleared the KAM and drove it some but no luck
Abs light and OD light on shifter flashing...spedometer not working either (forgot to say on last post)
Checked codes agiin and is now saying 0500 & 0603
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Old 06-30-2010, 06:42 PM
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Those are all signs of a bad abs sensor . Where did you get the new one ? possibly its a bad one . Did you fix the wiring harness or replace it . If you fixed it check the repair . An abs sensor is only a magnet that sees a blank spot (tooth missing ) on the reluctor ring which closes the circuit . The computer compares revolutions there to the ones at the tailshaft . There is an equation the computer looks for , if it's wrong , bam abs light , no speedo , flashing o.d. light .......... It's real basic so I would go back over that stuff and look for a popped fuse .
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Old 06-30-2010, 06:51 PM
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My dumb *** dog chewed the wires in two that go into the abs sensor on the rear diff...
I had no clue and took off in the truck...it would shif unless I redlined it than it would hard as hell...
ABS light on as well as OD light flashing on shifter and spedometer not working
Got it home and found the chewed wires..killed the stupid *** dog and repaired the wires and replaced the ABS sensor on top of the rear dif as well. The ABS fuse was also blown in the fusebox. Replaced
Drove it ...No Luck

Scanned codes...0603 & 0500 Cleared them and they came back soon as started.
One code is KAM and the other is speed sensor

I bought the ABS sensor from the Ford Dealer and did a real nice repair on the harnass...shrink tube and all
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Old 06-30-2010, 07:01 PM
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Hmmmm........... Not sure what else to look for . I would still say check the wiring repair . Even though you did a good job on it maybe a wire came apart or maybe the wire has a break in it . You gotta figure no problems before the dog chewed it , now this . I wouldn't think the abs unit itself would be bad , the fuse blew as it should have , but I suppose it could be . Bad Dog BAD !
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Old 06-30-2010, 07:21 PM
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Okedoke...I will undo my repair and see If it's basackwards...thanks
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Old 06-30-2010, 07:25 PM
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check the fuse for the speedo cluster. mine popped once without me knowing and did all the same things you just described; hard shifts, no speedo, overdrive light flashing. hope this helps
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