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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 483 (Charging System - General Information - F250-F550 Super Duty) >> Diagnosis And Testing >> Charging System - Single Generator >> Component Tests >> Generator On-Vehicle Tests - No-Load Test

Generator On-Vehicle Tests - No-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.
  1. Switch the tester to the voltmeter function.
  2. Connect the voltmeter positive lead to the generator B+ terminal, circuit 36 (YE/WH) (gas engines) / circuit 1119 (RD) (diesel engines) and the negative lead to ground.
  3. Turn all of the electrical accessories off.
  4. With the engine running at approximately 2,000 RPM, check the generator output voltage. The voltage should be between 13.2 and 15.5 volts. If not, refer back to the pinpoint test or GO to SYMPTOM CHART .
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