LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> Electrical >> Body Electrical >> Wiring Systems - Introduction >> Diagnostic Information & Procedures >> Testing For Electrical INTERMITTENTS
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Testing For Electrical INTERMITTENTS

Perform the following procedures while wiggling the harness from side to side. Continue this at convenient points (about 6 inches apart) while watching the test equipment.

If the fault is not identified, perform the procedure below using the MIN MAX feature on the J 39200  DMM.Special Tools . This feature allows you to manipulate the circuit without having to watch the J 39200  .Special Tools . The J 39200  will generate an audible tone when a change is detected.Special Tools .

IMPORTANT: The J 39200  must be used in order to perform the following procedure since the .Special Tools .J 39200  can monitor current, resistance or voltage while recording the minimum (MIN), and maximum (MAX) values measured.Special Tools .
  1. Connect the J 39200  to both sides of a suspected connector (still connected), or from one end of a suspected circuit to the other.Special Tools . Refer to Troubleshooting with a Digital Multimeter  for information on connecting the J 39200  to the circuit.Special Tools .
  2. Set the rotary dial of the J 39200  to the V (AC) or V (DC) position.Special Tools .
  3. Press the range button of the J 39200  in order to select the desired voltage range.Special Tools .
  4. Press the MIN MAX button of the J 39200  .Special Tools . The J 39200  displays 100 ms RECORD and emits an audible tone (beep).Special Tools .
    IMPORTANT: The 100 ms RECORD mode is the length of time an input must stay at a new value in order to record the full change.
  5. Simulate the condition that is potentially causing the intermittent connection, either by wiggling the connections or the wiring, test driving, or performing other operations. Refer to Inducing Intermittent Fault Conditions .
  6. Listen for the audible Min Max Alert which indicates that a new minimum or maximum value has been recorded.
  7. Press the MIN MAX button once in order to display the MAX value and note the value.
  8. Press the MIN MAX button again in order to display the MIN value and note the value.
  9. Determine the difference between the MIN and MAX values.
    • If the variation between the recorded MIN and MAX voltage values is 1 volt or greater an intermittent open or high resistance condition exists. Repair the condition as necessary.
    • If the variation between the recorded MIN and MAX voltage values is less than 1 volt an intermittent open or high resistance condition does not exist.
scientia non olet · About LEMON Manuals