If a line shows high resistance but is not physically damaged, what action should you take?

• A. Check and reseat all connectors, clean contacts, and verify cable integrity.
• B. Replace the entire line immediately.
• C. Ignore the reading; it will self-correct.
• D. Increase the transmitter power to overcome resistance.

Answer: (A)

When a line shows high resistance but isn’t physically damaged, the problem is usually a bad connection or dirty contacts rather than a wire fault. Connectors and contacts are where resistance can creep in from dirt, corrosion, or loose seating, which disrupts the current path in a sound-powered circuit. The best course is to check and reseat all connectors, clean the contacts, and verify cable integrity. Reseating restores proper contact pressure, cleaning removes oxidation, and checking the cable confirms there isn’t hidden damage or a broken conductor. If the issue persists after fresh seating and cleaning, use a known-good line or inspect/replace the suspect connector. Avoid increasing transmitter power or replacing the entire line right away, as that doesn’t address the underlying poor contact and can mask the fault or cause other issues.