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Generator Test: Discovery

  1. Connect carbon pile rheostat according to manufacturer's instructions. Turn off all accessories. Start engine and run at 3000 RPM. Rotate carbon pile load control until greatest amperage output (minus 10 percent for EFI and ignition loss) is obtained without allowing voltage to drop below 12 volts.
  2. Ensure engine is still running at 3000 RPM. Switch selector to regulator test and read voltmeter. Reading should be 13.6-14.4 volts. Switch selector to diode/stator test. Turn on headlights. With engine still running at 3000 RPM, read voltmeter. Reading must be in the "OK" range.
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