I surrender...brake problems
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Elder User
Joined: Jan 2004
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I surrender...brake problems
Within the last year I have been through 3 sets of rotors and as many pads on the front of my 94 Aero. They seem like they are sticking or something because after installation and a couple hundred miles later I jack it up and try to turn the tires and they turn but very hard like they are sticking? I replaced the calipers less than a year ago as well. To note...my RABS light comes on intermittantly and I have no idea what that could be. I suspect this to be the root of all the problems Im having...any clues? Is there a RABS sensor or something that can fail?
Posting Guru
Joined: Jul 2004
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From: Mitchell, SD
Pull codes, that would help some.
The Rabs system is not the great in the world. Under the break res is the module for the rabs and over time it will stick. If it does, you rear brakes will not brake, causing your front brakes to do all the work, in return, you are burning through rotors and pads.
Also I would check the condition of the front brake lines. Over time the rubber colapses inside causing the front calipars not to release.
Recently, someone, I think it might have been ken1mod, installed an adjustable proportioning valve under the RABS and disconected the rabs. If you do a search here, you should find it. Fairly cheap to do and you can adjust to what kind of load you have.
I believe in your year their is a speed sensor in the rear axle that not only runs the rabs, but also the odometer/speedo.
EDIT: Here is the link: https://www.ford-trucks.com/forums/s...d.php?t=411782
The Rabs system is not the great in the world. Under the break res is the module for the rabs and over time it will stick. If it does, you rear brakes will not brake, causing your front brakes to do all the work, in return, you are burning through rotors and pads.
Also I would check the condition of the front brake lines. Over time the rubber colapses inside causing the front calipars not to release.
Recently, someone, I think it might have been ken1mod, installed an adjustable proportioning valve under the RABS and disconected the rabs. If you do a search here, you should find it. Fairly cheap to do and you can adjust to what kind of load you have.
I believe in your year their is a speed sensor in the rear axle that not only runs the rabs, but also the odometer/speedo.
EDIT: Here is the link: https://www.ford-trucks.com/forums/s...d.php?t=411782
Last edited by 93nighthawk; Oct 22, 2005 at 07:20 PM.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
the RABS test connector is up under dash to right of steering column...
tech info>
http://www.asashop.org/autoinc/jan99/techtips.htm
ford aero service cd online iso large broadband only
http://www.fordcds.com/
Aero in Truck CDs
there is a vertical pin switch in the top of the proportioning valve in line just after master cylinder that corrodes and locks up
if front caliper pistons are forced backward with fluid forced backward thru system locks up RABS valve...always release bleeder with rubber hose into partial container of brake fluid before taking off caliper...
switch in mine is in center of the valve and has a black plastic top 3/4"inch hex if i remember...electrical plug 2 wire on top...clean switch with silicon e spray....flsuh and bleed entire system entire system with DOT3-4 new brake fluid if not done in last 2 years...master cylinder>proportioning valve>RABS valve if you can get at it>rr wheel cyl>left front caliper>lr wheel cyl>rf caliper...yes, I know not the old school fartherest away first...but new Ford ABS bleeding tech and it works...
tech info>
http://www.asashop.org/autoinc/jan99/techtips.htm
ford aero service cd online iso large broadband only
http://www.fordcds.com/
Aero in Truck CDs
there is a vertical pin switch in the top of the proportioning valve in line just after master cylinder that corrodes and locks up
if front caliper pistons are forced backward with fluid forced backward thru system locks up RABS valve...always release bleeder with rubber hose into partial container of brake fluid before taking off caliper...
switch in mine is in center of the valve and has a black plastic top 3/4"inch hex if i remember...electrical plug 2 wire on top...clean switch with silicon e spray....flsuh and bleed entire system entire system with DOT3-4 new brake fluid if not done in last 2 years...master cylinder>proportioning valve>RABS valve if you can get at it>rr wheel cyl>left front caliper>lr wheel cyl>rf caliper...yes, I know not the old school fartherest away first...but new Ford ABS bleeding tech and it works...
Last edited by 96_4wdr; Oct 22, 2005 at 07:31 PM.
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Elder User
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Yeah I eliminated it being the speed sensor because my speedo seems to be working fine. The module you are talking about...it's under the master cylinder? Is it within the master cylinder or can it be replaced on its own? I ask becuase about 1 year ago I put a new master cylinder on (old one was leaking) and that seems to be when my braking woes began.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
my brakes were so bad, I had to use both feet to get the beast stopped in panic stop...my proport. valve switch was totally locked and corroded but cleaned up nicely...wheel cylinders were corroded and not moving..
yes, proportioning valve is next in brake line at output of master cylinder...probably got air in system including RABS...
leaking mc sucks and pumps lots of air into system
I've got better than new brakes now...can hang myself on the shoulder belt in a hard panic stop and the RABS works great.
yes, proportioning valve is next in brake line at output of master cylinder...probably got air in system including RABS...
leaking mc sucks and pumps lots of air into system
I've got better than new brakes now...can hang myself on the shoulder belt in a hard panic stop and the RABS works great.
Last edited by 96_4wdr; Oct 22, 2005 at 07:39 PM.
