All I know is: with the lineloc mounted right at the master and in the line to the front brakes it will hold the fronts on rock solid (with no rears) for as long as the solenoid is energized. I don't recall but I don't think the "brake" light comes on - but there is a seperate lineloc light to show its on (just in case you forget you're holding the button I guess!)
I agree 100%
that's what I remember ….lineloc mounted on firewall with line out of master directly to solenoid then to the low pressure switch where lines go to frt and rear wheels also separate light to indicate system in use as long as you manually hold button on.
