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Home >> Chevrolet >> 2002 >> Astro Van Passenger, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 792 (Wiring Systems) >> Diagnostic Information and Procedures >> Measuring Frequency

Measuring Frequency

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Connecting the DMM to the circuit before pressing the Hz button will allow the DMM to autorange to an appropriate range.

The following procedure determines the frequency of a signal.

  1. Apply power to the circuit.
  2. Set the rotary dial of the DMM to the V (AC) position.
  3. Connect the positive lead of the DMM to the circuit to be tested.
  4. Connect the negative lead of the DMM to a good ground.
  5. Press the Hz button on the DMM.
  6. The DMM will display the frequency measured.
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