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There are several reasons why the temperature gauge on a Ford Ranger may not be functioning properly, such as issues with connectors, wires, cooling fan, relay, or thermostat. It is crucial to have the temperature gauge working correctly in order to monitor the truck's temperature. The main culprit is likely a faulty temperature sensor that is not transmitting the signal to the gauge. It is recommended to bring the vehicle to a professional mechanic or dealership for a thorough diagnosis and repair. Typically, the cost for this service ranges between $100 to $150, depending on labor and parts expenses. In most cases, the problem is minor and can be resolved by simply replacing the faulty component.
A few typical causes that may lead to the temperature gauge of a Ford Ranger malfunctioning are: issues like a short circuit, loose connections, or corroded wires in the electrical system connected to the sending unit or gauge. Additionally, problems with the cooling fan, relay, or a faulty thermostat could also be at fault.