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The function of a Jeep Cherokee Starter Relay is to transmit battery current to the starter solenoid to crank the engine. Within the electrical system of Jeep, this small switch sits in the starter control circuit. Either the ignition switch or powertrain control module commands this small switch. As a result, high current reaches the starter motor only when the key is in the start position. When the low-current control signal is detected, the armature inside the Starter Relay will move from off to on. After this, the Starter Relay closes contacts that pass full battery voltage onwards. It is a temporary connection that is only activated under certain conditions so that there is not constant engagement. A Starter Relay that has failed may sometimes become stuck or lock in the on position. This can keep the starter engaged too long, causing stress on the transmission and other starting components. A Starter Relay may also fail to stay off, leaving you without the ability to get your car started. Every Jeep Cherokee model utilizes the same logic, and the same device is common on Cherokee engines, so the Starter Relay is defined here in a single general form, which provides reliable ignition for the bigger Jeep Cherokee family.