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The air conditioning in a Tracer works through the power relay below the air cleaner. The low pressure switch on the accumulator near the firewall and the high pressure switch near the radiator cross member feed signals to a relay in the power relay box under the air cleaner. This relay box then sends information to the A/C compressor clutch. If you can jack up the car, remove the right front wheel and splash shield, you can "back probe" the wires on the A/C clutch and see if they are getting about 13 volts when the engine is running and the A/C is on. If it has the voltage and the compressor is NOT running, the problem is in the compressor. If it doesn't have the 13 volts, the problem is electrical and is wiring, the relay box or one of the switches, including the dash controls. Good luck eliminating these. To be sure, you can run a wire from ground and the battery directly to the compressor clutch to see if it will engage. If it does, the problem is electrical; if it doesn't, the problem is in the compressor.
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