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Generator On-Vehicle Tests - Load Test

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. 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 (BK/OG) (2.3L), or circuit 36 (YE/WH) (3.0L).
  4. With the engine running at approximately 2,000 rpm, adjust the tester load bank to determine the output of the generator. Generator output should be greater than the graph shown below. If not, refer back to the pinpoint test or GO to SYMPTOM CHART .
    Fig 1: Generator Output AMPS Graph
    G04621836Courtesy of FORD MOTOR CO.
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