Where is the temperature sending unit on a 1988 Toyota pickup?
The temperature sending unit on a 1988 Toyota pickup is located on the engine block, usually near the thermostat housing. It's a small sensor with one or two wires connected to it. Because there might be two (one for the gauge, one for the ECU if equipped with one), you may need to consult a wiring diagram for your specific engine to be certain. A repair manual for your truck model and engine will be the most definitive resource to locate it precisely.