abs light is on???
Thread Starter
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Trailering
Joined: Apr 2014
Posts: 19
Likes: 0
From: fargo
abs light is on???
hey all, i recently purchased an 02 f350 crew cab short box srw 4x4 7.3l power stroke diesel pickup. i knew it needed some work when i bought it and i thought i'd ask a question before i throw any more parts at it.
the abs light was on when i bought it. i replaced both front wheel bearing assemblies, (one had a bad shaft bearing and the other one was making noise). i was hoping this would solve the abs light but it didn't. i do not have anything for pulling abs codes which would be the smart thing to do. the speedometer works fine so i don't think its the vehicle speed sensor. i have had the light go off a few times but it always comes back on within a mile or less.
what else should i look at before i take it to a guy who wants money to hook his tester up.
thanks
luke
the abs light was on when i bought it. i replaced both front wheel bearing assemblies, (one had a bad shaft bearing and the other one was making noise). i was hoping this would solve the abs light but it didn't. i do not have anything for pulling abs codes which would be the smart thing to do. the speedometer works fine so i don't think its the vehicle speed sensor. i have had the light go off a few times but it always comes back on within a mile or less.
what else should i look at before i take it to a guy who wants money to hook his tester up.
thanks
luke
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
One of the sensors went south. Revisit the connections, since you just R and R'd the hubs.
Check that no fuses were pulled to fool it. Could have been a simple fix that someone didn't really care about.
I run with no OBS because I plow in the winter. I like it. Feels more educated than the Government telling me to lock em all up or slowly drift into a Mercedes..
I'll look for your pin out on the abs. (No promises)
JS
Denny
Check that no fuses were pulled to fool it. Could have been a simple fix that someone didn't really care about.
I run with no OBS because I plow in the winter. I like it. Feels more educated than the Government telling me to lock em all up or slowly drift into a Mercedes..
I'll look for your pin out on the abs. (No promises)
JS
Denny
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Look at what Mark said above, if your sure fuses etc are good. Crawl under and inspect the wiring to the dif sensor. If it looks good pull the sensor, Make sure it doesn't have a bottle cap attached. Reinstall after cleaning. Not sure at this point.
Update us. Can only get narrowed down.
Denny
Update us. Can only get narrowed down.
Denny
Logistics Pro
Joined: Nov 2004
Posts: 4,795
Likes: 47
You can get a code reader at Autozone for under $30 that also reads abs codes; good to have available .
Had a 2006 F350 plow truck that the abs light would sporadically come on and off. Per the code reader, it was two of the sensors. Never had any issues with the brakes so I never did anything to fix it.
Had a 2006 F350 plow truck that the abs light would sporadically come on and off. Per the code reader, it was two of the sensors. Never had any issues with the brakes so I never did anything to fix it.
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
You can get a code reader at Autozone for under $30 that also reads abs codes; good to have available .
Had a 2006 F350 plow truck that the abs light would sporadically come on and off. Per the code reader, it was two of the sensors. Never had any issues with the brakes so I never did anything to fix it.
Had a 2006 F350 plow truck that the abs light would sporadically come on and off. Per the code reader, it was two of the sensors. Never had any issues with the brakes so I never did anything to fix it.
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
Mine went out with a new set of front hubs, but mine is also 2WD. I firmly believe the new hubs' reluctor rings are just set back a tiny bit too far and the sensors can't "sense" their presence. Not yet confirmed, but it's been like this for 2 years now. I'm gettign ready to do front ball joints again, and will dig further at that time to see if I can coax the reluctor rings out a tiny bit, or perhaps drive the inner bearing races a tiny bit further into the hubs.
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Thread Starter
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Trailering
Joined: Apr 2014
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From: fargo
well i finally replaced my vehicle speed sensor on the rear diff. the light is still on. i drove it twice since i replaced the sensor, about 5 miles each way. the wire harness looked good, speedometer still works as it should. i dont know.
the sensor is an electro magnet right? so diff fluid doesnt have anything to do with it. do i need a scanner to clear the code?
thanks for your input
the sensor is an electro magnet right? so diff fluid doesnt have anything to do with it. do i need a scanner to clear the code?
thanks for your input
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Joined: Dec 2011
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Unplug the front wheel ABS sensors at the rear of the front fender liners.
With a DVOM, measure the resistance between pins on the wheel side of each harness, via the separated connector.
A working front ABS sensor will have around 700 ohms.
With a DVOM, measure the resistance between pins on the wheel side of each harness, via the separated connector.
A working front ABS sensor will have around 700 ohms.
Thread Starter
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Trailering
Joined: Apr 2014
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From: fargo
i crawl under the pickup and traced the two wires from the rear diff speed sensor. didnt see any issues. with key on, engine off, i got 5.4 volts between the two wires. speedo still works just fine. the only code that i shows is C1230
should i replace the speed sensor again? should i replace the abs control module? there arent many parts left to replace in the abs system.
should i replace the speed sensor again? should i replace the abs control module? there arent many parts left to replace in the abs system.
Super Moderator
Joined: Dec 2011
Posts: 13,286
Likes: 6,058
i crawl under the pickup and traced the two wires from the rear diff speed sensor. didnt see any issues. with key on, engine off, i got 5.4 volts between the two wires. speedo still works just fine. the only code that i shows is C1230
should i replace the speed sensor again? should i replace the abs control module? there arent many parts left to replace in the abs system.
should i replace the speed sensor again? should i replace the abs control module? there arent many parts left to replace in the abs system.
Mountain Pass
Joined: Jun 2012
Posts: 141
Likes: 0
From: Western Ma
had same issue with both my obs 7.3 and my current E99 7.3
Several weeks ago my 99 ABS warning came on and I ignored it for just over a week as it would not always come on. Then went the speedo, odometer and no auto shift. Picked up a VSS from napa and it was dead out of the box, so I thought. I measured voltage, not resistance as other posted stated and it was good. That was a Sunday morning. Dealership couldn't get one til Tuesday and I popped that in and it was all good but still the ABS was on. Bought the pigtail even though there seemed to be no water intrusion as I could see and I added more wire to go up to about 6" from body harness and wired it in. ABS stayed off when I started her up and hasn't been back.
"
Several weeks ago my 99 ABS warning came on and I ignored it for just over a week as it would not always come on. Then went the speedo, odometer and no auto shift. Picked up a VSS from napa and it was dead out of the box, so I thought. I measured voltage, not resistance as other posted stated and it was good. That was a Sunday morning. Dealership couldn't get one til Tuesday and I popped that in and it was all good but still the ABS was on. Bought the pigtail even though there seemed to be no water intrusion as I could see and I added more wire to go up to about 6" from body harness and wired it in. ABS stayed off when I started her up and hasn't been back.
"
