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You should check your Toyota Tacoma's owners manual. There should be a diagram for the location of your thermostat.
Do a Google search for it.
It is at the engine end of the top radiator hose.
show pic's of replacing thermostat on dodge durango
diagram showing where the thermostat is located
Thermostat housing diagram for a 2000 Pontiac grand am?
97 Grand AM Try replacing the radiator.
need diagram for replacing timing belt
When removing and replacing a heater core, it is important to have a diagram. This diagram for the given can be found in its maintenance manual.
You can find a diagram for replacing the air conditioning compressor on your 1994 Chevy 1500 pickup truck in a Chevy service manual. Many auto-parts stores will supply the diagram when you purchase the air conditioning compressor.
The thermostat can be found on the front of the engine, near the bottom. A diagram of the thermostat can be obtained from most auto-parts stores.
Follow the upper rad hose from the rad to the engine and there you will find the thermostat in a housing. When replacing it make sure the spring on the thermostat goes toward the engine.