Jeep 68083380AA Micro Relay

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Several electrical accessories in the vehicle utilize relays to transmit current to the component.

Use an ohmmeter to check continuity through the relay control coil, and if the relay contains a resistor or diode, check the resistance in the appropriate directions. 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 deenergized. Connect a fused jumper wire to terminal 86 and the positive battery terminal, and another jumper wire between terminal 85 and ground. When the connections are made, the relay should click. With the jumper wires connected, check for continuity between the power circuit terminals. If the relay fails any of the tests, it should be replaced.

Many electrical accessories in the vehicle utilize relays to transmit current to the component. If the relay is defective, the component won't operate properly.

Most relays are located in the engine compartment fuse and relay box, while others can be found in various wiring harnesses underneath the instrument panel.