ABS module replacement

[Tugboat238]

I've been chasing a dragging front passenger brake for a while now, and after replacing the slide pins, caliper, hose, and bleeding the abs, all to no avail, I've come to the conclusion it is the ABS module.

For anyone that has dealt with this, is this something I should tackle on my own, or do I need to send it to a mechanic? And is it worth the $600 for a brand new one vs like $100 or so for a used one?

Any thoughts or ideas are appreciated

Thanks

Edit: Also, does anyone know if I need to replace the whole ABS, or just the black part with the electronics? Everything I've seen has been unclear.

 

[Intuit]

Have you tried disabling ABS as confirmation for the source?

Had an intermittent dragging rear passenger brake. More details...
https://www.fiestastforum.com/threads/caliper-slide-mounts-the-permanent-fix.29023/

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[Tugboat238]

Have you tried disabling ABS as confirmation for the source?

Had an intermittent dragging rear passenger brake. More details...
https://www.fiestastforum.com/threads/caliper-slide-mounts-the-permanent-fix.29023/

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I have not tried that. From my research it looks like the issue is something to do with the valves in the ABS getting stuck, so I guess I would have to completely bypass the whole ABS unit to test that, which sounds like quite the ordeal. Or did you mean something different?

 

[Intuit]

The nanny systems (torque vectoring, stability control) operate the ABS quite often with normal driving. ABS unplugged, if you can operate the brakes and they're normal then the valve isn't stuck closed. If it's at all pulling or other with ABS unplugged then it may be restricted. Once verified that it isn't stuck closed or restricted, continue driving with it unplugged. If the problem disappears then reenable ABS and drive it again. If the problem returns then you've verified ABS as a factor.