Go Back   Ford Truck Enthusiasts Forums > Small Chassis Trucks > Ranger & B-Series
Sign in using an external account
Register Forgot Password?


Ranger & B-Series All Ford Ranger and Mazda B-Series modelsSPONSORED BY:

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-24-2011, 05:20 PM
dpoc dpoc is offline
Freshman User
 
Join Date: May 2006
Posts: 37
dpoc is starting off with a positive reputation.
Brake system bleeding w/Rear ABS

Hello,

I am trying to help a buddy of mine fix his Ranger. It is a 1994 Ranger XLT, Regular cab, two wheel drive, manual transmission and I think it has rear ABS. A front brake line blew which drain the master cylinder. Also a couple of pieces of brake line at the rear had to be replace along with the rear wheel cylinders. After installing the new brake system components we were trying to bleed the system. After reading the repair manual I had it said that vehicles with rear ABS you are to bleed the ABS module before bleeding the rest of the system. There is a module where the book described it (driver's side inside the frame rail) with brake line running to it. I am assuming this is the rear ABS module? I didn't see anything that looked like a bleeder on the module. Any ideas as to where to look? Also when I open the bleeders on the rear wheel cylinder no brake fluid came out. Any thought on that? Any help is appreciated.
Reply With Quote
  #2  
Old 07-24-2011, 06:17 PM
pawpaw pawpaw is offline
Moderator
 
Join Date: Jan 2004
Location: SW Va
Posts: 9,246
pawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to behold
If you've gotten air into the ABS module, you'll need a special scantool that can actuate the ABS module & a tool to apply vacuum at the wheel cyls to evacuate the system in order to get all of the air out of the ABS motor. A Brake shop, or the Dealer can do that.

You can probably get most of the air out of the system with a hand vacuum pump, connected to the RR, LR, RF, then LF wheel cyls in that order. Keep a close watch on the master cyl fluid level so it doesn't get low & induce more air in the system.

But if air has gotten into the ABS motor, you'll need a scantool to actuate it while applying vacuum to the system.

I have gravity bled a system a couple of times, but thats slow & lately use a "one man" bleed system to do it myself, when I didn't have a helper to pump the brake pedal & it works ok, just have to keep an eye on the brake master cyl fluid level & make sure the hose fitting is tight & no air bubbles are in it, or in the bottom of the catch container where the end of the bleed fluid line is.

Motorcraft PM-1 DOT-3 brake fluid is a top notch product & reasonably priced.

Some thoughts for pondering, let us know how it goes.
__________________
99 Ranger XLT 4dr 4x2 4.0L 5spd Auto 3.55L/S Payload Pkg2 Tow Pkg

Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)

Our signature is a sign of a job completed, autograph your work with excellence
Reply With Quote
  #3  
Old 07-24-2011, 07:31 PM
greenpus greenpus is offline
Elder User
 
Join Date: Feb 2001
Posts: 976
greenpus is starting off with a positive reputation.
I bought one of those tanks that you attach to your master brake cylinder in place of the cap and then pump up the tank and it pressurizes the entire braking system. Can't pump it up too much cause you'll blow the brakes
but it makes bleeding brakes a one man job and I love it.
I have abs on my rear and have never done anything special to bleed the rear. I think if you are following the correct procedure for bleeding your rears then it should work but may take some time on your part to get all the air out of the rear system and as pawpaw states you need to do the farthest calipers first and then work towards the master cylinder.

Quote:
Originally Posted by pawpaw View Post
You can probably get most of the air out of the system with a hand vacuum pump, connected to the RR, LR, RF, then LF wheel cyls in that order.
Reply With Quote
  #4  
Old 07-25-2011, 08:37 PM
dpoc dpoc is offline
Freshman User
 
Join Date: May 2006
Posts: 37
dpoc is starting off with a positive reputation.
With a 1994 being pre-OBDII would you still need a scan tool to activate the ABS motor? If I am understanding greenpus right there is no bleeder on the ABS valve itself. Right? So I should be able to go right to the right rear and start at that wheel cylinder? Thanks again for the information.
Reply With Quote
  #5  
Old 07-25-2011, 09:02 PM
pawpaw pawpaw is offline
Moderator
 
Join Date: Jan 2004
Location: SW Va
Posts: 9,246
pawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to behold
the scantool is used to actuate the ABS motor, in the event air has entered it.
Otherwise if air hasn't entered the ABS valving, a normal system bleed proceedure will suffice.
__________________
99 Ranger XLT 4dr 4x2 4.0L 5spd Auto 3.55L/S Payload Pkg2 Tow Pkg

Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)

Our signature is a sign of a job completed, autograph your work with excellence
Reply With Quote
  #6  
Old 07-25-2011, 09:40 PM
dpoc dpoc is offline
Freshman User
 
Join Date: May 2006
Posts: 37
dpoc is starting off with a positive reputation.
I am assuming that since the master cylinder was drained air has entered the ABS motor. Is there a scan tool on the market that the home mechanic can buy to actuate the ABS motor? If so which one would be recommended and where can you buy one? I have an OBDI/OBDII scan tool but does not read ABS codes. Will this tool work to actuate the ABS motor on a OBDI vehicle?
Reply With Quote
  #7  
Old 07-25-2011, 11:04 PM
pawpaw pawpaw is offline
Moderator
 
Join Date: Jan 2004
Location: SW Va
Posts: 9,246
pawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to behold
I'm not aware of a low cost, over the counter, non professional scan tool that'll actuate the ABS system, but the Dealer & most brake shops have high end scantools that'll do it.

If the master cyl has been opened, consider first doing a bench bleed on it, then try the conventional system bleed routine at each wheel cyl as I noted above & let us know how it goes.
__________________
99 Ranger XLT 4dr 4x2 4.0L 5spd Auto 3.55L/S Payload Pkg2 Tow Pkg

Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)

Our signature is a sign of a job completed, autograph your work with excellence
Reply With Quote
  #8  
Old 07-30-2011, 09:11 PM
dpoc dpoc is offline
Freshman User
 
Join Date: May 2006
Posts: 37
dpoc is starting off with a positive reputation.
Finally got a chance to work on the brakes again and here is the latest. I took of the master cylinder and bench bleed that. Re-installed it and tried bleeding the wheel cylinder again and nothing. I took the line off coming into the ABS valve to verify that there was fluid getting to the valve and there was. So I took the line off of the output side of the ABS valve and there is nothing coming out. When we pumped the brakes you could hear some air and a little fluid was squirting out but that was it. Something else I should add. When I took the brake drums off they looked like the shoes have not been wearing on them in a while and the shoes were starting to wear but not to the point of being completely gone. Could the ABS valve just be bad and has been for a while? I bleed the front brakes and took the vehicle for a short drive and the brakes feel like they are working fine. The ABS light and the brake light are not on. So I am still really confused?? So I am not sure if it would be wise to just replace the valve or if it still air in the valve that is causing the problem?
Reply With Quote
  #9  
Old 07-30-2011, 09:35 PM
pawpaw pawpaw is offline
Moderator
 
Join Date: Jan 2004
Location: SW Va
Posts: 9,246
pawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to behold
Seeing as how it has new rear wheel cylinders & some new brake line installed, why not consider running this puppy by a trusted brake shop & let them have a go at bleeding the system with their scantool & a vacuum source connected to the wheel cylinders.

They'll soon know if the RABS module is faulty.

If you replace the ABS valve, you'll still need a shop to hook up their scantool to actuate & bleed the air out & sometimes this is tricky.
__________________
99 Ranger XLT 4dr 4x2 4.0L 5spd Auto 3.55L/S Payload Pkg2 Tow Pkg

Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)

Our signature is a sign of a job completed, autograph your work with excellence
Reply With Quote
  #10  
Old 07-31-2011, 01:09 AM
ford2go's Avatar
ford2go ford2go is offline
Posting Guru
 
Join Date: Apr 2003
Location: Frequently frozen MN
Posts: 2,488
ford2go has much to be proud offord2go has much to be proud offord2go has much to be proud offord2go has much to be proud offord2go has much to be proud offord2go has much to be proud offord2go has much to be proud offord2go has much to be proud offord2go has much to be proud of
I have a shop manual for 91 Rangers -- which probably use the same system, and it doesn't show any bleed screw on the ABS. ( There is one for F150s from that era).

It does show a diagnostic connector. Of course, they call out their Rotunda scan tool.

I had a 91 Ranger and did the brakes - including a rear line replacement.
I bled them in the normal fashion, and there was no problem.

So, X2 on get a shop to figure out the RABS. Did your buddy ever notice the ABS coming on? -- you know that rapid cycling of the brakes.

Good Luck,

hj
__________________
ford2go (hj)
No fords left except in my heart
Reply With Quote
  #11  
Old 08-01-2011, 02:10 AM
76supercab2's Avatar
76supercab2 76supercab2 is offline
Postmaster
 
Join Date: Feb 2003
Posts: 4,043
76supercab2 has a good reputation on FTE.76supercab2 has a good reputation on FTE.76supercab2 has a good reputation on FTE.
I have a 93 ranger the rest of this post is in the assumption that the 94 has the same system. It is rear wheel abs only. Hence there is no 'motor' in the valve. Only 2 needle valves and no need for a special bleed procedure. One valve closes to isolate the rear brakes from the master cylinder and prevent brake pressure from rising if the rear wheels have or are about to lock. The other valve dumps fluid to an accumulator dropping brake line pressure to allow the rear wheels to keep turing and keep from locking. When both valves are inactive, the RABS valve just passes fluid through.

If you are not getting fluid to the rear brakes, the valve might be blocked with rust or gunk. You could try cleaning it or simply replace it. I would not recommend bypassing it as the system does not have a proportioning valve to balance the front and rear brake pressures. (Ford calls it a 'combination valve'). The RABS II valve performs that function.
Reply With Quote
  #12  
Old 08-21-2011, 08:07 PM
dpoc dpoc is offline
Freshman User
 
Join Date: May 2006
Posts: 37
dpoc is starting off with a positive reputation.
I finally got a chance to work on this again. After trying to bleed the brake again with no luck. I finally replaced the rear ABS valve (not sure if that is the proper term) and everything worked great. I was able to bleed the brake with no special tools. Thanks to everyone for the information!
Reply With Quote
  #13  
Old 08-21-2011, 09:09 PM
pawpaw pawpaw is offline
Moderator
 
Join Date: Jan 2004
Location: SW Va
Posts: 9,246
pawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to behold
OK, good feedback on fixing your brake bleed problem & to hear your on the road again!!!
__________________
99 Ranger XLT 4dr 4x2 4.0L 5spd Auto 3.55L/S Payload Pkg2 Tow Pkg

Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)

Our signature is a sign of a job completed, autograph your work with excellence
Reply With Quote
  #14  
Old 03-09-2012, 09:04 AM
Tazzy Wazzy Tazzy Wazzy is offline
New User
 
Join Date: Mar 2012
Posts: 6
Tazzy Wazzy is starting off with a positive reputation.
got a 1993 ranger and found the bleeder screw is on the top of ABS unit
Reply With Quote
  #15  
Old 03-09-2012, 10:38 AM
michigan66's Avatar
michigan66 michigan66 is offline
Posting Guru
 
Join Date: Mar 2005
Location: Saginaw, MI
Posts: 1,530
michigan66 is gaining momentum as a positive member of FTE.
Rangers had RABS through the 1994 model year. All wheel ABS was introduced on the 1995 models.
__________________
2008 XLT, 2.3 DOHC, 5R44e Automatic, 7.5" axle, 4.10 gears, 50 K miles
Motorcraft Blend in Engine, PS, PB, A/C, 225/70 x 15 Continental ContiTrac RWL tires,
extended cab, 6' bed, Access tonneau cover.

Previous vehicle: 1991 XLT, 2.3 SOHC (Lima), M5OD, 7.5 axle 3.45 gears. Donated to a charity.
Reply With Quote
Old 03-09-2012, 10:38 AM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
93 Bronco Help 5.0 Heaven 1978 - 1996 Big Bronco 2 09-29-2013 01:34 PM
94 Ranger, Rear Brakes 'Thumping'. Bad RABS? madcarpenter Ranger & B-Series 7 02-28-2012 06:51 PM
1994 Ranger brakes - HELP Schowalter Ranger & B-Series 1 09-23-2008 12:33 AM
Spongy Brake Pedal BigSix1 1987 - 1996 F150 & Larger F-Series Trucks 2 11-24-2004 10:59 AM
93 Ranger rear ABS Brake bleeding newtattoobob Ranger & B-Series 2 08-29-2002 09:03 AM


Go Back   Ford Truck Enthusiasts Forums > Small Chassis Trucks > Ranger & B-Series

Tags
1997, 2001, abs, advance, bleed, bleeding, brake, brakes, escape, f150, f250, ford, lines, pump, trac

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 08:15 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup