It finally hit me a few days ago how easy it should
be to make the Rubicon sway bar stay unlocked no matter what, 2Hi, on the highway, whatever.
The sway bar requires power to lock, or to unlock. This is not like an E-Locker where you have to constantly supply power to keep it going. Only needs power to lock when unlocked, or to unlock when locked (at least I'm 99% sure this is true).
Just put a normally-closed relay on B. Put your Jeep in to 4Hi, unlock the sway bar, then activate the relay and the sway bar no longer has power. No matter what you do, it shouldn't re-lock.
But, I tried it tonight and when I turned off the relay the sway bar made its motor noise for 2 seconds and it was locked again.
Ok, so I figured they put in some safety redundancy and I have to also simultaneously cut B1.
So I hooked up another relay to B1 and repeated the experiment simultaneously cutting power to B and B1. Again, a moment later the motor activated and it re-locked.
What??? Does anyone understand how this is possible? All it has is GND and CAN, there's no power source remaining. Is there something absolutely stupid where Chrysler was so scared of a law suit that they didn't consider double redundant power sufficient and put a little battery inside the sway bar? Hard to believe that'd be the case, but where else is it getting power?
I was 99% sure this was going to work and it did not
Any ideas on what could possibly be going on here? The electrical unit is pretty much sealed on the sway bar so I don't really want to go cutting into it. Anyone ever taken one apart and seen either huge capacitors to store enough power to run the motor for a few seconds, or a small battery?