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.

Switch the tester to the ammeter function.
Connect the positive and negative leads of the tester to the corresponding battery terminals.
Connect the current probe to the generator B+ output terminal, circuit 38 (RD).
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 .

Fig 1: Generator On-Vehicle Tests - Load Test Graph - Base Vehicle

Courtesy of FORD MOTOR CO.

Fig 2: Generator On-Vehicle Tests - Load Test Graph - Police Interceptor/Long Wheel Base (LWB)

Courtesy of FORD MOTOR CO.