thierrymusic

hi, i just bought a LS400 from 1990 with 195.000 kms. And would like to disable the anti-theft alarm system, in order to avoid battery dry. I have the master key and the sub key - Locking with the remote system when lock button is on off doesn't change anything. The red light is still on when locking. Does anyboby know how to do it ? Any tutorial ? I read somewhere about a green wire to be grounded. Anyone tested it ? Many thanks Rgds, Thierry