door/ajar light always on

thanks dave ..is the diagnostic tool same one that checks for engine codes like emissions

Yes - but must have the ability to monitor parameters...

parameters?

Yes, that's what you would call the disposition of any component - a sensor - is it on or off, etc. You need to be able to monitor that. High grade diagnostic tools can do this.

thanks dave ..i used needle nose pliers to open and close door ..makes it quick ..then i sprayed back door did same ..last was glass window and whaala pinpointed the problem .the glass door handle needed adjusting and tightening. adjusting to latch properly .now lights,door ajar light and rear wiper works .rear wiper didnt work becuz it thoight glass door was open