I want to install a system that will shut down a propane forklift if it has sat idling for more than a couple minutes. Any recommendations? These will be installed on two 2004 Toyotas that don't have seat switches. I suppose I could install new seats with switches but maybe they could work off the forward lever and sense when the machine has not been in forward for as certain length of time. I want them to have adjustable time control. Also how do they reset after the machine is automatically shut down and the key is left on. What happens if the headlights are on? Can they be wired to shut down everything? Thanks for any info.