Mercury E7SZ-13A025-A RELAY

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Many vehicle accessories utilize relays for transmitting electrical signals. To check if the relay is fine, take it out of the car and test for continuity across the power circuit terminals. Place a fused jumper wire between one control circuit terminal and the positive battery terminal and another jumper wire between the other control circuit terminal and ground. Check for continuity across the power circuit terminals. It requires replacement if any of these tests are failed by the relay.

Remove the relay from the vehicle and use the ohmmeter to check for continuity between the relay power circuit terminals. There should be no continuity between terminal 30 and 87 with the relay de-energized.

The various relays are mounted in the engine compartment and several locations throughout the vehicle. The underhood power center, located next to the battery in the engine compartment, contains relays and high-amperage fuses.

Terminal 86 must be connected to battery positive (B+) voltage and terminal 85 to ground.