i take it your p.i.r light doesnt have an isolator switch, many dont although its good practice just to add one, if you have then just switch the isolator switch off , wait about 15 seconds then switch it back on this usually resets the p.i.r, basically you want to kill the power to the light, so even switch the circuit braker off that powers the light fitting, if this doesnt work get a new one because its knackered, if it worked fine before, but now it doesnt its usually a sure fire sign .lol
stoozybhoy
February 2010