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Generator On-Vehicle Test - Load Test

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. 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) (gas) or circuit 1119 (RD) (diesel).
  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 Chart .
    5. Fig 1: 70/115 Amps (Gas) (Standard)
    GF0012842Courtesy of FORD MOTOR CO.
    Fig 2: 82/135 Amps (Gas) (Extra Heavy-Duty Option)
    GF0012843Courtesy of FORD MOTOR CO.
    Fig 3: Generator Output Graph
    GF0004527Courtesy of FORD MOTOR CO.
    Fig 4: 95/140 Amps (Diesel) (Extra Heavy-Duty Option)
    GF0008244Courtesy of FORD MOTOR CO.
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