Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!motcsd!hpda!hpcupt1!hprnd!hprmokg!barry
From: barry@hprmokg.HP.COM (Barry Fowler)
Newsgroups: sci.electronics
Subject: Re: How can I fool the motion sensors connected to our lights?
Message-ID: <10040008@hprmokg.HP.COM>
Date: 10 Jul 89 16:12:50 GMT
References: <358@gorn.santa-cruz.ca.us>
Organization: HP Networked Computer Mfg. Operation
Lines: 5

Without trying to sound sarchastic.....

Try a "switch".  That is, bypass the switch inside the motion sensor 
with a SPST (single pole, single throw) switch when you wish to
override the motion sensor.