The car is TPI. Wiring/electric is not my strong suit. While driving, the car suddenly started to overheat. The single fan was not coming on. It does not come on at temperature, or when the air is on. It does, however, come on when hot-wired to pos battery. I have replaced the relay, and the 4 wire connector to the relay. No change. When I turn on the air, the compressor clutch clicks on and off at 2 or 3 second intervals, but the cooling fan doesn't come on, and I don't hear the fan relay click. Any idea's?