Bad ABS brake pump

Hey Guys,

Back in April my brake pump went bad on my 93 full size and started leaking brake fluid whenever the abs kicked in. I found a used pump and had it installed to find out that the abs did not work on it. At the time it was ok because I was no longer leaking fluid and do not really use abs in the summer. Now that winter is comming, I'm in michigan, I really need the brakes working good. Now, the trouble I'm having is I can't seem to locate a good used or rebuilt pump. I contacted the dealership and they said they no longer make it and I called 5 or 6 "yards" around the area and they all said no. I'm hoping somebody out there in the Bronco World might have am idea where I can find one.

Scott

93 stock Eddie Bauer

5.0 w/ only 83,000 miles

yo!

here is one source for the 4WABS Hydraulic Control Unit (HCU);

BBA reman;

http://www.bba-reman.com/content.aspx?cont...or_unit_problem

BBA quoteed me $200.00 plus shipping for repair last summer (JUL 09)

Used yard price locally is $150.00 w/no guarnatee or returns

Raybestos used to reman them too; cked w/Rock Auto, etc. but it seems Raybestos gave up due to Quality issues.

http://www.rockauto.com/catalog/moreinfo.php?pk=301651

HCU, Raybestos #ABS540042, was $303.79 + $100 core. Rockauto.com had (maybe still has it ) it Listed, but en e mail indicated that they had none in stock and had no availability date.

I know others have said they have "rebuilt" the hydraulic portion of the HCU and others have used Crown Vic parts (motor).

E bay units are getting scarce now...

Maybe Steve83 can hook ya up w/ one!

Thank you for the info. I called over to Rockauto and they checked with raybestos and they still have the part in the warehouses. They are suppose to email me the info on it this afternoon. I called over to bba-reman and they said they can rebuild the modulator for $99 or sell me a new-reman modulator for $149. I just do not know if that is the only problem. Is there a way to know? BBA said they do not sell the whole pump anymore.

I guess it was leaking before april, but I had it replaced in april. On the snowy roads of Michigan and the momentum of the Big Bad Bronc the ABS would kick in on snowy days and leak fluid all over. I was going through 1 of the 10 or 12 oz bottles (dont remember what size they come in) every week to week and a half. It was puddleing on top of the HCU.

ok, let us know if Raybestos comes through on the HCU.

Are you sure the brake lines on top of the HCU are Not leaking?

So far I have not heard back from RockAuto and they have not added it back to their site yet.

I did find a local salvage yard that was able to locate one for me and is having it shipped in. I asked like 3 times if it was the right one and they assured me that it was. I should have it thursday. I did not think it was that bad, I get the unit shipped in and a 30 warranty for $125.

Yeah, it was not the brake lines. If I remember correctly there is 2 allen or torx bolts that ***** in from the top front and hold the two parts of the unit together. It was leaking/pooling around them. I had it checked out by 2 different brake shops and they agreed with my findings. Neither one of them have access to this peice so I know they where not just trying to "create work". One of them even refilled my brake fluid for free because they felt bad they could not help me.

It's too bad that too many "specialty" shops/firms don't bother to get into this re-build business.

In NJ, 4WABS failure such as what you and I have are now reasons for a rejection sticker.

And the saga continues. I have shipped 2 bad brake pumps. The place I am getting them from is paying for all of the shipping so I am not out anything but the origional cost. However, I brought my Bronc to another garage and they ran a diag, cleared the codes and ran another diag. THey are not getting an error code from the abs but are getting a code from a tranny sensor and, if I remember correctly, a wheel speed sensor. Does anybody know if one of these two sensors could be tripping the abs "dummy light".

As far as the other pumps go one would not power up and the other blew 40amp fuses like they where nothing when it was tested.

Does anybody know if one of these two sensors could be tripping the abs "dummy light". " YES, both will light the AMBER ABS Light; as long as the bulb is good and in-place (you should see it light up as soon as IGN sw it turned to start...etc.

As far as the other pumps go one would not power up and the other blew 40amp fuses like they where nothing when it was tested. Figures.. at least tey're pluggin $ in for s&h..

ok; since Steve83 hasn't posted here yet, I'll do it for him and rec his info;

4WABS Self Test & Connector Diagram, Component Locations, DTCs, 93-96; USE THIS PROCESS! "...The 4WABS TEST Connector is red; located at the left-hand side (driver's side) of the engine compartment and marked ANTI-LOCK TEST; Light Flash Technique 1. Note: If 12V test light is not available, the amber ABS warning light also flashes during this test. Locate test connector in the engine compartment and install 12V test light between Pins C and E. 2. With the ignition off, jumper Pin E to B. 3. Turn key to RUN position. 4. Remove jumper between Pins E and B after 5 seconds. 5. Count light flashes of test light or amber ABS warning light..." read more

Source: by Steve83 (Steve, That dirty old truck) at http://www.supermotors.org/vehicles/regist...&original=1

do that test and post codes here or look em up in Steve's info; and also in my site at http://www.broncolinks.com/index.php?index=240

Thanks for the link, I will have to try it out this weekend.

On a side note, the light does not come on till the truck goes over 5 mph. Not sure if that make a difference or not.

miesk5 said:

It's too bad that too many "specialty" shops/firms don't bother to get into this re-build business.In NJ, 4WABS failure such as what you and I have are now reasons for a rejection sticker.

Click to expand...

i thought you abandoned the abs? this was the route i planned to go if my abs failed. are you unable to get a sticker if you bypass the abs?

bobstrat said:

i thought you abandoned the abs? this was the route i planned to go if my abs failed. are you unable to get a sticker if you bypass the abs?

Click to expand...

Bob,

I did jumper it out. And got a sticker @ local shop.

the long version:

After I went thru the endless phone cons from the NJ DMV and was concerned that the folks at the station may fail it (I had too much work @ the time to keep pulling yard parts); I went to an old-school shop that showed me the State's guidelines and he said that the Amber ABS Light or system disablement is Not a reason for failure or whatever they want to call the temp sticker.

here is what NJ is Now stating;

"To pass a safety inspection, vehicles are expected to be maintained according to the original manufacturer

Does anybody know if you put direct 12v to the HCU to test it if it will cause any harm to the HCU? I just had my third one tested and it too is bad. So, I am either having really bad luck or these things are really pieces of crap. I too am to the point that I beleive ABS is really over rated.

In MIchigan there are no inspections.

WOW. Thats a lot to address......

Between a full time job, going to school full time, and still finding time to coach my sons soccer team I really do not have time to work on my Bronc myself. So, I have enlisted the help of a local repair shop who has done good work for me in the past. That is why I have not been able to go through the trouble shooting myself.

The first pump I received, this time around, I dropped off with my Bronc and got a call a couple of hours later with them telling me that it was bad and would not power up, spin, or do anything. I asked if they installed it and they said no, that it was possible to test it without installing. They said that one of the pigtails has input for positive and negative, and that was how they tested it. I did the same with the second one and they again called me and said that this one powered up and spun but overheated. I started to doubt them so I took it to another shop and they "tested" it the same way and said that it kept popping 40a fuses. The second shop I went to is the first one that talked to me about codes. I can take it back in to have the codes read, I do not have a reader myself.

When the origional HCU was in the Bronco and it was leaking fluid all over, the ABS light never came on, only the brake light would come on if the fluid got to low. It wasn't until I installed the one that is currently in that the light started coming on whenever the Bronco reaches 5 mph.

My sons soccer season officially ended on saturday so that will free up my wednesday nights and saturdays.

As far as nobody in michigan being able to diagnose anything except Ryan, maybe your right............

Finally got a different pump put in and the abs light is still on. I did the trouble shooting and got ABS code 22. I look on Steve83's site and found the definition of the code as:

22 Front Left Inlet Solenoid Valve Concern Diagnosis

Possible Source(s):

� Intermittent open Circuit 495 (T).

� Terminal backout in anti-lock brake electronic control module connector Pins 17 and 40.

� Terminal backout in anti-lock hydraulic control unit connector Pins 1, 4 and 6.

� Open or shorted inlet front left valve coil.

� Open or shorted driver in anti-lock brake electronic control module.

I looked over the plug diagrams on file #48 and found the 495T reference on the HCU plugs and the ECM. I can check for a broke pin (495T) but do not know what pins #'s 1,4,6,17, and 40 are. Is there anything else I should be checking?