To make a short story long, the '00 Amigo, 3.2 liter, I bought had an overheat problem when I bought it. Changed out the thermostat, the water pump, and the coolant. Talk about corrosion! Whoever owned it before me never put anything but water in the radiator! Anyway, after doing all this, it still overheated, top radiator hose too hot to touch, lower hose a little cooler? I noticed the AC condenser fan would not run all the time. So, doing some trouble shooting, I started it up in my driveway, let it get hot, and then killed the engine and turned the key back on to see how long the condenser fan would run. The fan ran about 20 seconds and quit, so I tried to restart the engine, it would not start. Pulled out my voltage/ohm meter and checked the battery, 8.9 volts. All I can figure is the alternator was keeping the battery light off when the engine was running but the bad battery was screwing up the electronics, including the ECM that controls everything. The car never gave me a problem starting before this.?.? So check the battery. Bought a new battery, no more overheating!!