Help with a ABS/Speedo problem
Thread Starter
|
Junior User
Joined: Apr 2004
Posts: 63
Likes: 0
Help with a ABS/Speedo problem
Hey Guys,
At the begining of the week, my trucks speedo started to "bounce" around a bit and not soon after my ABS fault light illuminated. Thought it might be a speedo sensor of some sort, but before I got around to looking into the problem, I fund my dome/courtesy lights will stay on even after I lock up the truck(normally they go out right away). I found the fuse for the lights and pulled it. Fix a possible battery drain problem, but noticed that the one curcit controls all the items that are failing. Anybody have this happen? If so, is it a control box or computer of some sort?
Mike
At the begining of the week, my trucks speedo started to "bounce" around a bit and not soon after my ABS fault light illuminated. Thought it might be a speedo sensor of some sort, but before I got around to looking into the problem, I fund my dome/courtesy lights will stay on even after I lock up the truck(normally they go out right away). I found the fuse for the lights and pulled it. Fix a possible battery drain problem, but noticed that the one curcit controls all the items that are failing. Anybody have this happen? If so, is it a control box or computer of some sort?
Mike
Senior User
Joined: Sep 2004
Posts: 130
Likes: 0
there is a GEM module on top of the fuse box that controls misc electrical devices. to reset it, you have to unplug it, wait approx 3 min and plug it back in. you will have to pull the fuse box down to get to it, '99 f350 psd.
as far at the speedo and the abs light goes, that could be the vss going out. it's on top of the rear end housing.
as far at the speedo and the abs light goes, that could be the vss going out. it's on top of the rear end housing.
Elder User
Joined: Nov 2004
Posts: 798
Likes: 0
Hi Mike
If your truck is a 99.5 or later. It sounds like you have a speed sensor going out. It is located on top of the rear differential. And it looks at a toothed wheel inside the differential. It is used for speedometer, cruise control, part of the ABS etc.. Anything that has to do with speed. I'd start there. Or go pay the piper at the stealer.
If your truck is a 99.5 or later. It sounds like you have a speed sensor going out. It is located on top of the rear differential. And it looks at a toothed wheel inside the differential. It is used for speedometer, cruise control, part of the ABS etc.. Anything that has to do with speed. I'd start there. Or go pay the piper at the stealer.
Elder User
Joined: Jan 2004
Posts: 803
Likes: 0
From: Bobcaygeon Ont.
These guys are probably right on the vss. Your dome lights could be a switch stuck on the door. My wife car was doing the same thing. If there in the doors like my 99 sd spray in the hole with a good silicone lube. Seems to have cured hers for now. Also check the relay in the fuse panel for the light. iIt may be stuck on.
Thread Starter
|
Junior User
Joined: Apr 2004
Posts: 63
Likes: 0
Originally Posted by Cowboy350
Hey Mike, what year truck? On my 94 the speedo went haywire and it through the ABS light. Fixed the speed sensor and the light went off. Not sure about the other stuff.
Freshman User
Joined: Apr 2004
Posts: 40
Likes: 0
From: Southwest, Virginia
Replaced the speed sensor on the rear end of my '95 when the speedo was bouncing on it, and it fixed the problem. Picked the senor up at the dealer, run about $20 I beleive.
Trending Topics
Elder User
Joined: Feb 2004
Posts: 907
Likes: 0
From: West Haven, UT
Up here (Utah) $40 at the autozone, $20 at the dealer (go figure). About a 5 minute job including clean up.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
New User
Joined: Apr 2005
Posts: 5
Likes: 0
My '99 is doing something similar. The ABS and AirBag lights on the dash will not go out. Just bought the truck Saturday and this morning is when it started happening. Any ideas? My speedo is jumping or anything just the lights on the dash.