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  #1  
Old 11-10-2008
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abs light

Why does my ABS light come on whenever it rains or snows??

i shut the truck off and restart and its off. then I drive a block or two and it comes back on... WHY
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Old 11-10-2008
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you probably have a bad wheel speed sensor, or you could have a brake that is locking up and wont pulse with the abs. my front left would lock up because the caliper slide froze up and broke
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Old 11-10-2008
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you probably have a bad wheel speed sensor, or you could have a brake that is locking up and wont pulse with the abs. my front left would lock up because the caliper slide froze up and broke
nothing locks up.... after I shut it off and restart (light goes off) and drive and hit the brakes on ice.. the abs works.. just drive a lil bit more and BAM light comes on and hit the brakes and NO more abs....

always happens when it rains or snows
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Old 11-10-2008
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Hmmmmm. Not very experienced in this section but the only time I ever had that problem I had a leak in my rear brake. It was raining I had to stop quick and lost brake pressure and the light came on.

Check your brake fluid to make sure its not low. If it is fill it up and keep an eye on it. My understanding is it should not be low unless its leaking because its a closed circuit right?
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Old 11-10-2008
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i would be leaning more towards the wheel speed senosr then. and all your doing is resetting the abs computer and thats why it shuts the light off. probably the best advice would be taking it to a dealer and having them read the abs code
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Old 11-10-2008
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fluid is fine.. only happens when raining or snow..

where do I find the wheel sensors????? could they be dirty
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Old 11-10-2008
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Originally Posted by Fenech627 View Post
Hmmmmm. Not very experienced in this section but the only time I ever had that problem I had a leak in my rear brake. It was raining I had to stop quick and lost brake pressure and the light came on.

Check your brake fluid to make sure its not low. If it is fill it up and keep an eye on it. My understanding is it should not be low unless its leaking because its a closed circuit right?
true, but if your fluid was low your (red) brake light would illuminate, the reason your (amber) abs light came on was because it couldn't hold the pressure in the line to get the brakes to pulsate
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Old 11-10-2008
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Clean the plug connections in the square connector under the truck , about in the area under the driver's seat.Then coat the plug with dieelctric grease before putting it back together.
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Old 11-10-2008
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any pics??
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Old 11-10-2008
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Originally Posted by interceptorguy View Post
fluid is fine.. only happens when raining or snow..

where do I find the wheel sensors????? could they be dirty
your front wheel speed sensors are on the wheel bearing hub unit. and i doubt they would mess up from dirt being on the toner wheel, because its a pm setup. your rear wheel speed sensor is on the rear diff on the top of the pumpkin. as for replacement i don't know if the fronts can be changed with out the wheel bearing being replaced as well. the rear can be replaced though.
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Old 11-10-2008
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i'll go take some pictures and post em tonight i have to goto work here in a bit
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  #12  
Old 11-10-2008
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the rear sensor just unbolts and you can't see the front ones because of my dust shield
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Old 11-10-2008
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dont think its the front.. ill look under the truck under the drivers seat.. then check the back speed sensor
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Old 11-10-2008
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well I crawled under the truck and found the harness.. used a 10 MM socket nd unscrewed it.. cleaned it with conatct cleaner and hooked it back up.. went for a short ride and NO LIGHT... ill report back later and let you know!
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Old 11-10-2008
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ok yeah the front two are gonna be hard to get to because you got alot of stuff in the way
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  #16  
Old 11-10-2008
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its probably easiest to pull the tire off and you might have to take the caliper off can't quite remember if you can get to it
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  #17  
Old 11-11-2008
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well light came on just once.. compared to usual few times.. ill try and clean again tomorro really good.. post results
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  #18  
Old 11-11-2008
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another thing you could do is grab one of the code readers from napa or something. don't know if they do abs though. now for some odd reason my left rear likes to lock up makes braking interesting
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Old 11-11-2008
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try and get to the front ones you ever replaced the wheel bearings on one of these? doesn't take too long. about 45 min if your not messing around too much
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Old 11-11-2008
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i'm guessing he figured this out
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  #21  
Old 11-12-2008
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Quote:
Originally Posted by Hanks Rangers View Post
another thing you could do is grab one of the code readers from napa or something. don't know if they do abs though. now for some odd reason my left rear likes to lock up makes braking interesting
The code readersfrom napa ,az, ect. only read the OBD in the PCM.The ABS codes can only be read with a special tool at the dealer.

On the brake locking , does it usually happen right after it rains ?
That's 'normal' on Fords .Try a different brand of rear shoes.
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  #22  
Old 11-14-2008
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no light still on... gonna try and change the speed sensor
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  #23  
Old 11-20-2008
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changed the speed sensor.. will cross my fingers
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  #24  
Old 11-20-2008
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thats about all you can do, did you mess with the front ones at all?
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  #25  
Old 11-27-2008
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light still comin on.. time to go to the dealer
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