How to Troubleshoot Fuel and Emissions Systems

  1. Connect one side of the patch cord (A) terminal to a commercially available digital multimeter (B), and connect the other side of the patch cord terminals to a tester probe.
  1. Gently the pin probe (male) into the connector terminals from the terminal side. Do not force the tips into the terminals.
    • For accurate results, always use the pin probe (male).
    • To prevent damage to the connector terminals, do not insert test equipment probes, paper clips, or other substitutes as they can damage the terminals. Damaged terminals cause a poor connection and an incorrect measurement.
    • Do not puncture the insulation on a wire. Punctures can cause poor or intermittent electrical connections.