ABS BYPASS ? 98 Windstar
rickisrad
10-08-2013, 08:04 PM
I have a 98 Windstar 3.8 with ABS brakes. I have disabled the ABS due to a bad abs module. Is there a way to bypass all of the lines at the abs module? All the lines at the module are in horrible shape and one blew today. I was thinking of buying a NON ABS master cylinder and running new lines to it.
Has anyone done this? Are there any pressure valves that need to be installed when I do this? Thanks for any suggestions
Has anyone done this? Are there any pressure valves that need to be installed when I do this? Thanks for any suggestions
phil-l
10-10-2013, 02:14 PM
It's been a while since I worked on the ABS module for my '00, so I'm doing this from memory...
I replaced the electronic portion of my Windstar's ABS module some years ago (and have been pleased with the results - still working fine).
Note that the master cylinder is essentially a "non-ABS" unit: All of the ABS work is done in the module, which is under the van, beneath the driver's seat. If the ABS electronics are disabled, the brakes still work just like a non-ABS system.
If I recall correctly, there are 6 hydraulic fittings on the ABS module, two coming in from the master cylinder and then 4 going out of the module, one to each wheel.
You could "Bypass" the ABS module by using the existing master cylinder and finding a way to combine the front and rear hydraulic circuits (I believe the master cylinder is split between front and rear circuits). This is essentially what your disabled ABS module is doing today. I'm not sure there's a way to do this that doesn't create more work than keeping the module and replacing the bad lines.
By the way: In my experience, once the infamous Ford electronic module weakness is fixed, Windstar ABS systems are very reliable. You could consider the brake line replacement job to be a good time to get another module and get your ABS working again. I've seen decent looking modules on eBay that probably have usable hydraulics and dead electronics - but there's also an electronic module repair service available on eBay that will repair the electronic portion of the module for $50.
I replaced the electronic portion of my Windstar's ABS module some years ago (and have been pleased with the results - still working fine).
Note that the master cylinder is essentially a "non-ABS" unit: All of the ABS work is done in the module, which is under the van, beneath the driver's seat. If the ABS electronics are disabled, the brakes still work just like a non-ABS system.
If I recall correctly, there are 6 hydraulic fittings on the ABS module, two coming in from the master cylinder and then 4 going out of the module, one to each wheel.
You could "Bypass" the ABS module by using the existing master cylinder and finding a way to combine the front and rear hydraulic circuits (I believe the master cylinder is split between front and rear circuits). This is essentially what your disabled ABS module is doing today. I'm not sure there's a way to do this that doesn't create more work than keeping the module and replacing the bad lines.
By the way: In my experience, once the infamous Ford electronic module weakness is fixed, Windstar ABS systems are very reliable. You could consider the brake line replacement job to be a good time to get another module and get your ABS working again. I've seen decent looking modules on eBay that probably have usable hydraulics and dead electronics - but there's also an electronic module repair service available on eBay that will repair the electronic portion of the module for $50.
rickisrad
10-10-2013, 06:50 PM
I was trying to find out what proportioning valves the non abs had. I decided just to re-do all the lines at the abs unit. I have a diagram from all data. I replaced two of them in the past. I have all the tools to do it so I might as well go ahead and replace the lines. I am not going to replace the ABS unit, I like the non abs better. Plus I do not have to worry about any of the sensors. Thanks for the help
phil-l
10-11-2013, 11:04 AM
I haven't seen a non-ABS Windstar, so I did a quick check. Wikipedia claims that ABS was standard equipment, even for the first generation Windstar. Interesting - I didn't know that.
However, even an ABS-equipped vehicle needs a proportioning valve (because front-rear brake balance needs to maintained even when ABS doesn't work) - and I see such valves for the Windstar available for sale.
So I suspect a non-functioning Windstar ABS mostly serves the purpose of combining each side of the front and rear brake circuits.
I you really want to get rid of the Windstar ABS hydraulic module, I'd start by looking at comparable Taurus models, which share a lot of hardware with the Windstar - and came in non-ABS-equipped versions. That said, I'm not convinced you'll save time/money/effort over just leaving the non-functioning module in place and replacing the rusted lines.
However, even an ABS-equipped vehicle needs a proportioning valve (because front-rear brake balance needs to maintained even when ABS doesn't work) - and I see such valves for the Windstar available for sale.
So I suspect a non-functioning Windstar ABS mostly serves the purpose of combining each side of the front and rear brake circuits.
I you really want to get rid of the Windstar ABS hydraulic module, I'd start by looking at comparable Taurus models, which share a lot of hardware with the Windstar - and came in non-ABS-equipped versions. That said, I'm not convinced you'll save time/money/effort over just leaving the non-functioning module in place and replacing the rusted lines.
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