[Mechanos]

If I understand keerucktly, Modern ABS put the Kaibosh on those.

Makes sense.... if the controller was plumbed in after the ABS unit. If the unit was plumbed in between the master cylinder and the ABS unit, I would think that the controller wouldn't know the difference.

On my brother's newer GC Overland, it has a modern gadget plumbed into the brake lines (came that way from the factory) that sends a proportional signal for trailer brakes.

I have one of those old style controllers laying around as well... it's just a hydraulicly actuated rheostat. The one I have is BIG and would be a bitch a to find a place to mount it in the cab.