help question on the rear end

i have a question about the sensor that plugs into the rear end do i need it can i just unplug it and just eliminate it what does the sensor do and by the way the truck is a 93 b2600i and also i have a question about the brake likes on the rear end what did you guys do with them i had ABS but i eliminated it and now my lines are jsut hanging there so i was wondering if you guys had any pics of what you did with the back passenger side brake lines i just want to make sure the first time i raiose or lower the truck its not going to bend are kink the brake lines thanks guys fr the help i really appreciate it

i was told the sensor was a speed sensor for the abs and if you have removed your abs just unplug it mine is unplugged and it doesnt affect it

well i was wanting to make sure before i eliminated it and be sure it didnt effect anything so i guess i will eliminate it it doesnt mess with you speedometer or your rpm gauge

your rpm runs of you its either your coil or distributor and your speedometer runs off your tranny

ok so i will just eliminate it than thanks