Generator On-Vehicle Tests - Load Test

2009 Mercury Milan Premier, 3.0 1, AWDSECTION Generator On-Vehicle Tests - Load Test
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. Switch the tester to the ammeter function.
  2. Connect the positive and negative leads of the tester to the corresponding battery terminals.
  3. Connect the current probe to the generator B+ output terminal, circuit 38 (RD).
  4. With the engine running at approximately 2,000 RPM, adjust the tester load bank to determine the output of the generator. The generator output should be greater than the graph shown below. If not, refer back to the pinpoint test or Go to Symptom ChartΒ .
  5. Fig 1: Generator On-Vehicle Tests - Load Test Graph - Base Vehicle
    GF0014503Courtesy of FORD MOTOR CO.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.