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The best way to Diagnose the Check Engine Light on a 2004 Explorer Sport Trac 1Locate the onboard diagnostic access port within the driver's side footwell. This will be a 16-pin plug coming off from the primary wiring harness below the dash. The access port is located for the left in the fuse panel and is extremely visible in case you climb in to the footwell.2Plug the OBD scan tool into the access port and ensure that that it is actually secure. Auto tools

3Turn the ignition on auto diagnostic software, but don't start off the engine. Then, energy on the scan tool.4Wait for the scan tool to retrieve the codes from the Sport Trac's laptop or computer. When the tool is performed, the display should really study "OK."5Unplug the scan tool and shut off the ignition. Use the Ford Explorer Sport Trac's service manual to translate the trouble codes on the scan tool (or see Resources section). To access the codes, press "Menu" on your scan tool, and select the "Stored Codes" option on the menu screen.

Tips on how to Diagnose Electrical Problems Having a Continuity Tester in your Automobile 1Turn off the car's engine and wait for ten minutes for any electrical charge to dissipate.2Lift the hood and disconnect the red lead wire from the battery.3Access the element you need to test.4Place the alligator clip on one make contact with point on the component and touch the wire to a separate make contact with point.5Listen for any continuous buzz or watch for the tester's light electric diode, or LED, to activate. This indicates that electrical energy is flowing via the component. When you know the battery is functional and that the element will obtain a current, the problem is inside the wires major towards the component.

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