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In troubleshooting a malfunctioning pump, checking the wiring and connections is crucial because electrical issues often cause operational problems. If there is a disconnection or fault in the wiring, the pump may not receive power or may operate erratically. Ensuring that all electrical connections are secure and that there is no visible damage to wiring is therefore the first step. This initial check can quickly identify if the issue is electrical, which is a common source of pump malfunctions.

Once the wiring and connections are confirmed to be in good condition, attention can then be directed toward other aspects such as motor oil levels, potential air leaks, or the condition of the impeller. Each of these checks is important but addressing electrical issues first is typically the most efficient way to resolve pump problems quickly.