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Pinpoint Test AH Outside Temperature Always Indicates 135-140°F (57-60°C)

  1. Verifying Condition: Turn ignition on. Read outside temperature. Remove No. 1 fuse (Town Car) or No. 5 (Crown Victoria and Grand Marquis). Instrument cluster should go blank.
  2. After 30 seconds, reinstall fuse. Read outside temperature. If reading is correct, refer to pinpoint index for further testing. See Figure . If reading is incorrect, go to step 3).
  3. Checking Connector: Unplug 16-pin connector (with Dark Blue/Yellow wire) at left rear corner of engine compartment, behind wheel well. Turn ignition on. Remove No. 1 fuse (Town Car) or No. 5 (Crown Victoria and Grand Marquis). Reinstall fuse after 30 seconds. Read outside air temperature.
  4. If reading is -40°F (-40°C), go to step 7). Go to next step if reading is not -40°F (-40°C).
  5. Checking Instrument Cluster: Remove instrument cluster finish panel. Unplug C2-1 connector from instrument cluster. See Figure . Using small screwdriver, release pin No. 1 (Pink/Orange wire) from C2-1 connector. Reinstall C2-1 connector. Turn ignition on.
  6. Remove fuse No. 1 (Town Car) or No. 5 (Crown Victoria and Grand Marquis). Reinstall fuse after 30 seconds. Read outside air temperature. If reading is -40°F (-40°C), repair wiring between instrument cluster and C1 connector. If reading is not -40°F (-40°C), replace cluster.
  7. Checking Air Temperature Sensor Connector: Reinstall pin No. 1 into C2-1 connector. Install connector onto instrument cluster. Unplug electrical connector from air temperature sensor at radiator support. Air temperature connector has Dark Blue/Yellow and Pink/Orange wires.
  8. Turn ignition on. Remove fuse No. 1 (Town Car) or No. 5 (Crown Victoria and Grand Marquis). Reinstall fuse after 30 seconds. Read outside air temperature. If reading is not -40°F (-40°F), repair wiring between instrument cluster C2-1 connector and air temperature sensor. If reading is -40°F (-40°C), go to step 9).
  9. Checking Air Temperature Sensor: Measure resistance between air temperature sensor terminals. Resistance should be 33,000-47,000 ohms at 60-70°F (16-21°C). If resistance is within specifications, return to step 1) and retest system. If resistance is not within specifications, replace air temperature sensor.
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