Weird Stuff Going On
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New User
Joined: Mar 2007
Posts: 11
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Weird Stuff Going On
1) My anti-lock brake light now stays on.
2) The overdrive light on the shifter flashes.
3) The speedometer dosen't move until I get to about 25 m.p.h.
This just started happening. Any ideas on what might be the cause.
I own a 1999 F250 7.3 Powerstroke with 86,000 miles.
Upgrades: Banks Six Gun, 4" exhaust, Evolution tuner, Air-raid intake.
Thanks in advance for any advice given
ladderdawg
2) The overdrive light on the shifter flashes.
3) The speedometer dosen't move until I get to about 25 m.p.h.
This just started happening. Any ideas on what might be the cause.
I own a 1999 F250 7.3 Powerstroke with 86,000 miles.
Upgrades: Banks Six Gun, 4" exhaust, Evolution tuner, Air-raid intake.
Thanks in advance for any advice given
ladderdawg
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
Your VSS (Vehicle Speed Sensor) on the rear diff is out. If you look on the top of the rear diff, there is a sensor with a electrical connection to it. Get a new one from Ford - about $25.00. It takes a 10mm, I think, socket and a screwdriver to pry it out. 10 minute fix.
Cargo Master
Joined: Jun 2003
Posts: 3,292
Likes: 6
From: Ardenvoir, Washington
Welcome to the Forum...You might try Napa. They are cheaper. P/N 530780 for $10.49. Fixed my problems with the flashing OD light and Speedo..(they called it a ABS Sensor). Top of rear-in and easy to replace.
Postmaster
Joined: Jun 2006
Posts: 2,647
Likes: 0
From: Fulltime RVer
If your VSS is in the Diff (like mine), and not part of the ABS, then you might have carrier bearings going bad, and metal fuzz is being attracted to the magnetic VSS and screwing up the signal. This is what happened to me, and I had similar symptoms.
Elder User
Joined: Sep 2006
Posts: 899
Likes: 0
From: Irmo, SC
The ABS light came on in my truck it turned out to be the front hub, both times. You might want to check them and make sure they are not going out. The second time the wheel hub went out on the highway. So now the good side is both of them are new. Some have said the flashing OD light is something going out in the trans, but when my trans went south there was no flashing light I saw. Might want to check the comuter for some codes from the trans.
Post Fiend
Joined: Sep 2006
Posts: 5,584
Likes: 0
From: Millbrook Alabama
Originally Posted by totin_tools
The ABS light came on in my truck it turned out to be the front hub, both times. You might want to check them and make sure they are not going out. The second time the wheel hub went out on the highway. So now the good side is both of them are new. Some have said the flashing OD light is something going out in the trans, but when my trans went south there was no flashing light I saw. Might want to check the comuter for some codes from the trans.
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Senior User
Joined: May 2004
Posts: 400
Likes: 0
also check your ground wire on the ABS unit. More than one of us had a ground wire that worked loose and have the exact same symptoms you've got.
The ground wire screws into the body directly in front of the driver's side battery.
The ground wire screws into the body directly in front of the driver's side battery.
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