Generator On-Vehicle Tests - Load Test

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. 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 36 (YE/WH) (gas engines) / circuit 1119 (RD) (diesel engines).
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 .

3G (Gas), 70/115 amps

Fig 1: Generator Output Graph - 3G (Gas), 70/115 Amps

Courtesy of FORD MOTOR CO.

6G (Diesel), 65/110 amps

Fig 2: Generator Output Graph - 6G (Diesel), 65/110 Amps

Courtesy of FORD MOTOR CO.

VR42 (Diesel), 95/140 amps

Fig 3: Generator Output Graph - VR42 (Diesel), 95/140 Amps

Courtesy of FORD MOTOR CO.