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-What relay are you referring to?
-What else have you already tried?
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Thank you for asking your question on JustAnswer.
-Was a different key used to start vehicle?
Thank you for asking your question on JustAnswer. The same fuse that is blown be it #18, #22, or #33 supplies voltage to the cars PCM (Powertrain Control Module) or otherwise known as the computer for the Keep Alive Memory (KAM). Find the blown fuse, and keep the AC compressor from blowing it again by replacing it or unpluging it, and all the symptoms you've described will go away.
Look under the hood between the radiator and the AC compressor you will see a small 2 wire connector plugged into the compressor just behind the compressor pulley. Umplug that connector from the compressor.
Then in the fuse box under the hood on the radiator support there is a blown 10 amp red mini fuse. Replace that fuse with another 10 amp fuse and you can drive the Taurus with no problems.
If you do not unplug the compressor and just replace the fuse, the fuse will blow again shortly because the AC compressor is sending a voltage spike that is blowning the fuse and causing the check engine light.
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