Ok so I have a 188E on my coffee table jumped out so it thinks it's on Auto and tries to take hall calls. This works:
S10=9, S19=1 this puts car on security but hall calls won't be locked until THLK is added in the car and group and grounded (HCLA didn't work.) Add FLO1, FLO2, etc IOs in car and group, ground to override that floor lock.
If you haven't added I/Os like this before, usually port/con 8 has spare I/Os. These inputs only work at the group level so you have to match port 8 in the car and group IO map to be able to ground the car I/O and have the IO change state in the group.