02 ABS light and bouncing speedometer.
Logistics Pro
Joined: Jan 2014
Posts: 3,595
Likes: 17
Well....
Swapped the VSS for a new one from Ford. In the process broke the clips off the original connector so I picked one up from O'Reilly's and splice it in properly. Changed the gear oil in the rear diff, THAT was way overdue good God. Buttoned it all back up, filled up the diff, took it for a test drive this morning aaaaand - nothing.
ABS light, OD flashing, no speedo, and no cruise. Tried running the harness up to the firewall as suggested earlier and I couldn't find any issues - even the convoluted tubing is still in good shape.
Only other thing I can think of right now is I may have spliced in the new connector backwards, but would that even matter? The new connector wires are both white, no identifying marks, so I hooked the left side up to red and the right side to green (OEM orientation in the original Ford connector).
Swapped the VSS for a new one from Ford. In the process broke the clips off the original connector so I picked one up from O'Reilly's and splice it in properly. Changed the gear oil in the rear diff, THAT was way overdue good God. Buttoned it all back up, filled up the diff, took it for a test drive this morning aaaaand - nothing.
ABS light, OD flashing, no speedo, and no cruise. Tried running the harness up to the firewall as suggested earlier and I couldn't find any issues - even the convoluted tubing is still in good shape.
Only other thing I can think of right now is I may have spliced in the new connector backwards, but would that even matter? The new connector wires are both white, no identifying marks, so I hooked the left side up to red and the right side to green (OEM orientation in the original Ford connector).
Logistics Pro
Joined: Jan 2014
Posts: 3,595
Likes: 17
VSS is brand new Ford-sourced. This only started happening after the flood waters. First the ABS went south, then the speedo started acting up two days later before finally quitting altogether. Wiring looks to be intact, haven't had time to probe terminals and wires fully yet.
Thread Starter
|
i ain't rite
Joined: Mar 2005
Posts: 65,585
Likes: 5,613
From: Marlboro Mental Hospital.
mine went out again with the rain every day for the past 2 weeks, then yesterday it started working again after 2 days dry.
this morning it is raining, and it stopped working on the way to the store.
this morning it is raining, and it stopped working on the way to the store.
Logistics Pro
Joined: Jan 2014
Posts: 3,595
Likes: 17
I finally fixed mine, had a separate thread in the Excursion forum.
Mine ended up being the ABS module itself. It receives and interprets the VSS signal before sending it to the speedo/odo. Based on where mine was (under the driver battery), I guess it got flooded out and shorted internally.
Mine ended up being the ABS module itself. It receives and interprets the VSS signal before sending it to the speedo/odo. Based on where mine was (under the driver battery), I guess it got flooded out and shorted internally.
Logistics Pro
Joined: Jan 2014
Posts: 3,595
Likes: 17
Just the electronic module on the ABS pump.
https://www.ford-trucks.com/forums/1...l#post15444533 <-- should be the follow up post on my fix from the Excursion thread.
https://www.ford-trucks.com/forums/1...l#post15444533 <-- should be the follow up post on my fix from the Excursion thread.
Cargo Master
Joined: Jan 2005
Posts: 2,902
Likes: 2
From: Pasadena, Maryland
Welcome to my hell.....I had your symptoms and a bouncing tach as well...
Home Depot has nice tarps to cover the cab for when it rains.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Senior User
Joined: Dec 2010
Posts: 198
Likes: 0
i think i found it.
stopped at the body shop this morning. of course this morning the light was out, speedometer worked and OD light was out.
the mechanic suggested bleeding the brakes again, saying there may still be an air bubble in the ABS unit from when i blew the brake lines last fall. put the pressure pot on, and sure enough, got 3 bubbles out of the lines.
brake pedal is a lot firmer now too.
not sure why that would effect the speedometer though.
stopped at the body shop this morning. of course this morning the light was out, speedometer worked and OD light was out.
the mechanic suggested bleeding the brakes again, saying there may still be an air bubble in the ABS unit from when i blew the brake lines last fall. put the pressure pot on, and sure enough, got 3 bubbles out of the lines.
brake pedal is a lot firmer now too.
not sure why that would effect the speedometer though.
Thread Starter
|
i ain't rite
Joined: Mar 2005
Posts: 65,585
Likes: 5,613
From: Marlboro Mental Hospital.
yea, it drove ne nuts for a while. i only found it when i realized the driver side headlight was not working.
when i pulled it apart there was a burn mark on the ABS module from the wire arcing against it.
and that also explained the intermittent work/ no work.
after i fixed it i realized it would only screw up when the headlights were on.
when i pulled it apart there was a burn mark on the ABS module from the wire arcing against it.
and that also explained the intermittent work/ no work.
after i fixed it i realized it would only screw up when the headlights were on.
Thread
Thread Starter
Forum
Replies
Last Post