To see a picture of where the thermostat is located in a 1995 mercury villager engine?
Follow the top hose from the radiator. Where this hose connects to the engine will be a housing connected by two bolts. Drain the coolant remove the hose from the housing end and remove these bolts. The thermostat is under this housing. You will probably have to move the air cleaner tube out of your way to get access to it. Its not a picture, but I hope it helps you.