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Help Needed! Preserving/Updating “Option B” ABS Modulator Fix / 3 Amigos
Hey everyone,Like many of you, I’ve had enough visits from the Three Amigos to last a lifetime.Recently, I got frustrated trying to track down clear, complete info about the Option B fix for the ABS modulator on the Discovery 2. The old Land Rover Club V.I. write-up from Josh is a goldmine, but the links are fading, some of the photos are gone, and the information is scattered across different forums and archived sites. So — I decided to rebuild and preserve that guide before it disappears completely. I’ve been working on a cleaned-up, modernized version of the full “Option B” Shuttle Valve Bypass Fix, written in plain English (and with a little humor to keep it human). I pulled material from the original LRCVI post, RSW Solutions, Falconworks, Atlantic British, and forum discussions here and elsewhere. I’ve still got to add photos. That said, I’m not claiming to be--nor do I want to be--an expert on it — I’m just a guy who wants to keep this information alive and easy to follow. I’m about to do the fix myself and will take high-quality photos along the way so we can have a definitive, preserved version for the next generation of owners. What I Need Help With:
Thanks in advance to everyone who’s shared info over the years. Without the collective brain trust here, most of us would still be staring at those three amber lights wondering where to start. Patrick Currently haunted by the 3 Amigos, but working on their deportation paperwork. Here's the link to the document so far: https://doc.clickup.com/9017289800/d/h/8cqhv28-157/085de525aba266c |
I can’t help with answers to your questions but I’m getting ready to do a full brake job on my 2002, and intend to undertake Option B at the same time. If I learn anything that might help I’ll let you know, but otherwise simply wanted to applaud your efforts and thank you for doing this.
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See below in bold.
Originally Posted by pwdiamond80
(Post 937991)
Hey everyone,Like many of you, I’ve had enough visits from the Three Amigos to last a lifetime.Recently, I got frustrated trying to track down clear, complete info about the Option B fix for the ABS modulator on the Discovery 2. The old Land Rover Club V.I. write-up from Josh is a goldmine, but the links are fading, some of the photos are gone, and the information is scattered across different forums and archived sites. So — I decided to rebuild and preserve that guide before it disappears completely. I’ve been working on a cleaned-up, modernized version of the full “Option B” Shuttle Valve Bypass Fix, written in plain English (and with a little humor to keep it human). I pulled material from the original LRCVI post, RSW Solutions, Falconworks, Atlantic British, and forum discussions here and elsewhere. I’ve still got to add photos. That said, I’m not claiming to be--nor do I want to be--an expert on it — I’m just a guy who wants to keep this information alive and easy to follow. I’m about to do the fix myself and will take high-quality photos along the way so we can have a definitive, preserved version for the next generation of owners. What I Need Help With:
Thanks in advance to everyone who’s shared info over the years. Without the collective brain trust here, most of us would still be staring at those three amber lights wondering where to start. Patrick Currently haunted by the 3 Amigos, but working on their deportation paperwork. Here's the link to the document so far: https://doc.clickup.com/9017289800/d/h/8cqhv28-157/085de525aba266c |
I did the option b about a year ago. It has been working great ever since! With the "switch only kit" this will only fix your issue if the issue is the shuttle valves themselves. You can test your old shuttle valves and see if they move freely and measure the resistance of the connector in different combinations of pressing the switches. (procedure detailed in the link below)
Most often the failure stems from the weak internal solder joints that connect the switch to the wabco unit, so it needs to be rewired with option b. Option A has you open up the wabco unit and fix the solder joints, but is more difficult and not worth it in my opinion. I think the writeup has you disconnect the brake lines from the wabco, but I did not do that. I followed the atlantic british shuttle valve replacement video which just has you bend the lines a little bit. The original write up with all the pictures can be found here https://web.archive.org/web/20170730...m/abs-mod.html Since it is on archive.org, it should be available for awhile. |
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