Howdy yall, Its been a while since I've been on the boards here. Sold my 96 F350 about a year and a half ago and just picked up a e99 a about 6 months ago. Needing some help and figured I'd stop in the best place I know!!!

early 99 F350 CCLWB DWW 4x4 Lariat

As the title say the ABS Light is on, the Speedometer, and Odometer are not working, and the OD light is flashing.

When I bought the truck, I replaced all the front end components. Including upgrading to 2000 style hubs and brakes.

I have read thread after thread on the symptoms and everything comes back to changing the VSS on the rear diff. I have replaced it twice, the first time with an after market, the second time with an OEM.

When I first started noticing an issue, the speedometer dropped out and came right back in. Later on it did the same thing but right after the ABS light came on. Got home, turned the truck off, back on and everything was back to normal. Headed back out a while later and the ABS light came on and stayed on. Every so often the speedometer would drop out. Then later the OD light started flashing. Found a place to pull over turned the truck off, back on and all back to normal. A few miles down the road and it started back over.

After some research, I replaced the VSS, and the problem seemed to go away. Headed out for a weekend trip, and the problem started all back over from square one. Remind you the truck runs fine with no issues, that I can tell anyways. On the way home the ABS light stays on, the OD light keeps flashing, Speedometer was still working. A couple days later the speedometer stopped working. (I just noticed this morning the odometer not working.)

Changed the VSS to the OEM and no change at all.

I'm getting ready to head out Sunday morning on a 1000 mile round trip and want to make sure the truck isn't going to be harmed.

I've seen some people talk about ohming the connector out, but never seen instructions on what to do.

I did have an issue with the windshield leaking. Replaced it and as far as I can tell its no longer leaking. The GEM, and fuse box has been replaced as well, due to it being all corroded.

I changed the diff fluid in it back when I was working on the truck, and everything looked good on the inside.

Anything else yall need to know, just let me know.

 

Have you checked all of your fuses that are related to the ABS system?

Also, do you have ForScan? I had a DS front ABS sensor that went T's up, and caused a very similar situation.

You'll need a scan tool that can monitor the ABS module.

 

I do have an obdlink module. However I haven't bought the full version of forscan. Is it worth it? I know the obdlink app doesn't like my truck. Here is the list from forscan that I have. I never did unhook the batteries after changing the vss and leaving them undone. But I've tried clearing the codes and theyou never seem to go away. I know my truck has a lot of issues, but I haven't gotten around to trying to fix them all. That's coming up before long.

===OBDII DTC ===

Successful DTC reading, no error codes found


Module: On Board Diagnostic II

===END OBDII===


===PCM DTC P0238===

Code: P0238 - Turbo/Super Charger Boost Sensor A Circuit High


Module: Powertrain Control Module


Diagnostic Trouble Code details


Turbo/Super Charger Boost Sensor A Circuit High


Follow the routines in the service manual to resolve the DTC listed.



===END PCM===


===PCM DTC P1249===

Code: P1249 - Wastegate Control Valve Performance


Module: Powertrain Control Module


Diagnostic Trouble Code details


Wastegate Control Valve Performance


Follow the routines in the service manual to resolve the DTC listed.



===END PCM===


===PCM DTC P0500===

Code: P0500 - VSS sensor circuit fault.


Module: Powertrain Control Module


Diagnostic Trouble Code details


VSS sensor circuit fault.


Open VSS circuit.


Shorted VSS circuit.


This DTC may be caused by :


Suspect VSS.


Worn or Damaged VSS drive gear on transmission output shaft.


Suspect PCM.


Faulty or damaged instrument cluster module.



===END PCM===


===PCM DTC P0603===

Code: P0603 - Power interruption on KAPWR circuit.


Module: Powertrain Control Module


Diagnostic Trouble Code details


Power interruption on KAPWR circuit.


Open KAPWRcircuit.


Loose/poor battery connections at the battery and engine block.


This DTC may be caused by :


If a recent PCM disconnect or battery disconnect is suspected no action is required unless the code continues to appear after being cleared.


Reprogramming can cause this code. If reprogramming was done clear codes and release vehicle.


Improper connection



===END PCM===


===PCM DTC P1211===

Code: P1211 - Injector Control Pressure Higher/Lower Than Desired (engine running)


Module: Powertrain Control Module

===END PCM===


===OTC DTC P0500===

Code: P0500 - VSS sensor circuit fault.


Module: Overhead Trip Computer


Diagnostic Trouble Code details


VSS sensor circuit fault.


Open VSS circuit.


Shorted VSS circuit.


This DTC may be caused by :


Suspect VSS.


Worn or Damaged VSS drive gear on transmission output shaft.


Suspect PCM.


Faulty or damaged instrument cluster module.



===END OTC===


===OTC DTC U2015===

Code: U2015 - Overhead Trip Computer Signal Link Circuit Failure


Module: Overhead Trip Computer


Diagnostic Trouble Code details


Overhead Trip Computer Signal Link Circuit Failure


Operator Action


Run self test.


All CMDTCs


Fix all relevant DTCs then clear codes and retest.


Note:


DTCs that start with 'U' are faults which occur during module-to-module communication.


Modules should never be replaced based only on a 'U' code. These codes do not always indicate a problem, and can be caused by normal diagnostic functions, carried out on the vehicle.



===END OTC===


===OTC DTC B1203===

Code: B1203 - Fuel sender circuit short to battery


Module: Overhead Trip Computer

===END OTC===


===ECS DTC B1318===

Code: B1318 - Battery voltage Low


Module: Electronic Crash Sensor


Diagnostic Trouble Code details


Battery Voltage Too Low


--- Possible Causes --------


- Battery Voltage below 9.6volts


-Suspect Battery state of charge Charging system



===END ECS===


===GEM DTC B1352===

Code: B1352 - Ignition key in circuit fault


Module: Generic Electronic Module


Diagnostic Trouble Code details


Ignition key in circuit fault


--- Possible Causes --------

This DTC can be generated by:


-Open Key-In Ignition Switch circuit

- Battery short Key-In Ignition Switch circuit

- Battery short Ignition Switch RUN/ACCY circuit

- Suspect Ignition Switch

- Suspect Lighting Control Module.



===END GEM===


===GEM DTC B1310===

Code: B1310 - Power door unlock circuit failure


Module: Generic Electronic Module


Diagnostic Trouble Code details


Power door unlock circuit failure


--- Possible Causes --------

This DTC can be generated by:



-Open Driver Central Lock Switch


-Suspect Driver Central Lock Switch


-Suspect Generic Electronic Module



===END GEM===


===GEM DTC B1300===

Code: B1300 - Power door lock relay coil circuit failure


Module: Generic Electronic Module


Diagnostic Trouble Code details


Power door lock relay coil circuit failure


--- Possible Causes --------


Power door lock circuit failure


Open circuit, short to ground, or to battery


-Suspect


Circuit wiring Defective module



===END GEM===


===GEM DTC B1217===

Code: B1217 - Horn Relay Coil Circuit Failure


Module: Generic Electronic Module


Diagnostic Trouble Code details


Horn relay coil circuit short to battery



===END GEM===


===GEM DTC B1323===

Code: B1323 - Door Ajar Warning Lamp circuit failure


Module: Generic Electronic Module


Diagnostic Trouble Code details


Door Ajar Warning Lamp circuit failure


--- Possible Causes --------

This code can be generated by:


-Open/Short circuit between Door Ajar Warning Lamp and Generic Electronic Module

- Open/Short circuit between Door Ajar Warning Lamp and power circuit

- Suspect Door Ajar Warning Lamp

- Suspect Generic Electronic Module.



===END GEM===



After downloading the full version, I was able to get the codes to disappear. So we will see if any of them come back.

 

A little more background on the truck. I took it for a test drive. Pulled up to a stop sign on the way back and thought it was a 4 way stop. Ended up pulling out in front of a lady and she ran into the passenger side wheel. Not much damage to the truck. Replaced all that. Found multiple Ground wires going every where, I bet I pulled out 50' of ground wire. Replaced the batteries. All new power cables. Cleaned the engine bay, and under the truck, it was nasty. That was all 4-6 months ago and haven't had any issues until now.

 

Okay. This is strange. Hasn't worked in three last ~200 mies. Going down the road and it starts acting right.

 

False alarm. It went back to not working after dinner.

 

Have you looked very closely at the connector for the VSS, looking for corrosion both front and back were the wires go in, as well as any places the harness could be rubbing?

 

I looked it over and didn't see anything wrong with it. both clips are still good on it as well. kinda broke the wire-loom in several places too look at the wire, wire looks fine. But i didn't have time that day to follow it to far out.

 

After troubleshooting today. I found out that fuse (25) ABS control module was not making a good connection. Replaced the fuse and its working good now.

 

Excellent. And thank you for reporting back. That info may well help someone else in the future.

 

2001 7.3 SD. 197k.. I have read through the string and still have a problem
ABS light on, Speedometer flatline, Flashing O/D on shift. Replaced the VSS on the rear yoke, No improvement. Little heavy oil on old sensor. Connection was good and both tabs intact, no corrosion. Cable routes fine over yolk, no hangups.. I am going to try and clean battery terminals and reapply.
Subsequently now my turn signals don't work, the stick indexes but no dash light or sound, hazards work completely fine. This could be a weird coincidence.. Any suggestions beyond what has been said. I won't discount the new durmast VSS i bought is bad but not sure..