7 Way Pin Connector

7 Way Pin Connector. I have a car trailer with interior lights that don't work. SATA specifies a different power connector than the decades-old four-pin Molex connector used on Parallel ATA (PATA) devices.

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Seven-pin connectors are rarely used on trailers for local use. I have a car trailer with interior lights that don't work. The missing pin is a ground that's tied together with the other ground pins.

Probe the seven-pin connector with a test light.

The missing pin is a ground that's tied together with the other ground pins.

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They didn't work with my Tacoma either. Repeat this process for both turn signals. The pin you are missing is a ground pin so it's possible that the PSU is configured in a way that makes it unnecessary.