interrupt a hot wire from your ignition switch to a critical component would be 1 way.
Mar 14, 2011 at 2:53 AM
RASMATAZ
✓Experienced Mechanic
75,988 POSTS
Put a toggle switch between the white and black wire at the ignition switch and the white and black wire fuse no.39 50amp on the underhood fuse and relay box-this will kill the igntion switch