Members Jay A. Posted March 22, 2012 Members Share Posted March 22, 2012 The ABS systems are independent of the ECU. The S-197 ones are tied together with a communication wire but it is not needed. The earlier SN-95 systems are 3 channel (two front and one to the rear). The newer SN-95 (03-04 maybe older) Cobra are the better ones because they are 4 channel.(two front and two rear). So swithing to the newer model will require a new harness and an additional rear brake line plumbed. the existing wires and wheel speed sensors in the front can be used but will have to be spliced into the new harness. (you will have to find a junk yard harness with at least a foot of the pigtail remaining to splice into). As far as the dual masters go it is all hydraulic pressure. So yes they will work too. However I think the factory single master cylinders are a single size bore for the front and rear. so the dual masters may need to be both the same size as well. As always with dual masters some experimenting will have to be done. but the idea is to try to match the stock system that the ABS was designed for (Master cylinder size, caliper piston area, rotor diameter). As Dean said earlier that a bias control on the rear circuit help with tuning. the bias control goes right after the master cylinder before the Hydraulic control unit. With the dual masters the balance bar serves this same purpose. If you need more info feel free to call. Jay Quote Link to comment Share on other sites More sharing options...
redsnake08 Posted March 22, 2012 Share Posted March 22, 2012 Thanks for the help Jay! Will the wheel speed sensors from the 03 04 work on my 97 hubs? If so I ll call MPS and have them send me everything then I wont have to splice wires. Quote Link to comment Share on other sites More sharing options...
Members Jay A. Posted March 22, 2012 Members Share Posted March 22, 2012 Yea, As far as I know all the tone rings and wheel speed sensors are the same on all SN-95 ABS cars. On S-197 the tone rings are the same (well very similar) as the SN-95 but the wheel speed sensors are different. However the earlier 3 channel cars had the sensor in the differential ( I believe) so tone rings will have to be added to the axles on these cars. I think the axles need to be removed to do this. I think the whole discussion on the 03-04 Cobra stuff is that particular Hydraulic control unit HCU (ABS pump) is the superior model. or maybe it is just a better tune in the control module. not sure. Quote Link to comment Share on other sites More sharing options...
RichardP Posted March 22, 2012 Share Posted March 22, 2012 However the earlier 3 channel cars had the sensor in the differential ( I believe) so tone rings will have to be added to the axles on these cars. 3 channel ABS Mustangs have a tone ring/sensor on each axle. Richard P. Quote Link to comment Share on other sites More sharing options...
Mystic_Cobra Posted March 23, 2012 Share Posted March 23, 2012 However the earlier 3 channel cars had the sensor in the differential ( I believe) so tone rings will have to be added to the axles on these cars. 3 channel ABS Mustangs have a tone ring/sensor on each axle. Richard P. I can confirm this from what's on my car as well. Quote Link to comment Share on other sites More sharing options...
Members Jay A. Posted March 23, 2012 Members Share Posted March 23, 2012 Well then the 3 channel wiring harness might just plug into the 03-04 Cobra HCU (ABS Pump). This is the next question. I don't know the answer. Jay Quote Link to comment Share on other sites More sharing options...
redsnake08 Posted March 26, 2012 Share Posted March 26, 2012 I stopped by a friends shop today that had a 03 cobra with the motor out and the wiring is different it only had 1 connector and it wasnt like the one on my 97 system(97 has 2 connectors). Also was at the ford dealer on saturday and he couldnt find the wiring illustration for the 03,04s abs. So does any one know how far back into the harness this system differs or what section I can tell the junkyard I need? I really dont want to do any cutting or splicing if I can avoid it. Dean If your reading this I hear your a possible expert.. any thoughts Quote Link to comment Share on other sites More sharing options...
johngeorge Posted May 21, 2012 Share Posted May 21, 2012 I second redsnake08's question, what year mustang ABS harness do I need to source from the junkyard? Also, any idea on what abs tone rings would fit on ford/torino 9" axle ends? Quote Link to comment Share on other sites More sharing options...
jeff33702 Posted November 15, 2012 Share Posted November 15, 2012 I'm researching this for my street, occasional open track car. Any chance of getting the links to the images repaired? Thanks guys - good info. Jeff Quote Link to comment Share on other sites More sharing options...
marshallmosty Posted November 24, 2012 Author Share Posted November 24, 2012 Links repaired. I'm pretty sure all the pictures are the same an in the correct order. I use FB to act as my "host" and I guess they transferred servers or something... If anyone has any questions, or wants different pictures, please give me a call: nine four zero seven three six nine zero four three or send me a PM. Quote Link to comment Share on other sites More sharing options...
alexandros Posted March 4, 2013 Share Posted March 4, 2013 (edited) The 99-04 4 wheel ABS can be run as a standalone unit same as all the previous years. As far as the FR500/GT500 4 wheel ABS unit goes, can you use the 03/04 Cobra IRS and Spindle wheel sensors and abs wheels? Edited January 15, 2015 by Guest Quote Link to comment Share on other sites More sharing options...
marshallmosty Posted July 4, 2013 Author Share Posted July 4, 2013 I'm working on the diagnostic port side of the ABS installation and need help sourcing the following: 1. 2011-2012 PCM (Powertrain Control Module) 2. 2011-2012 RCM (Restraint Contol Module) All of these need the mating connector and at least 12" of wires for me to wire into. If anyone knows of good wrecking yards that deal in these relatively new models would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
alexandros Posted January 15, 2015 Share Posted January 15, 2015 I have a schematic of the 03/04 cobra 4 wheel abs harness. Can anyone verify if it will plug into the gt500/fr500 unit and if the wiring locations are the same? As well, will the 99-04 irs and spindle abd wheels and wheel sensors work with the fr500 unit? If you are using hydroboost will it affect the abs unit? Is the 03/04 Cobra ABS unit better than the FR500 unit? Quote Link to comment Share on other sites More sharing options...
Members Marshall M. Posted January 29, 2015 Members Share Posted January 29, 2015 All, An update on my system. I was still having trail braking snap-oversteer with the FR ABS unit, so I switched to the GT500 module and it settled the car down quite a bit. I have a feeling that the FR ABS unit is really going to be a setup and driver preference and not a "one size fits all" solution. Is this system better than the SN95 system that came out of the car... who knows... Quote Link to comment Share on other sites More sharing options...
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