The **F2VF-4W2-R** is an automotive-grade relay commonly used in Ford vehicles. It is designed to handle high-current loads and is typically manufactured by vendors like **Tyco (TE Connectivity)** or **Bosch** under Ford's specifications. Below is the detailed breakdown of its electronic characteristics and configuration. --- ### 1. General Specifications This part is a **Mini ISO Power Relay**. It is built to withstand the harsh environments of an engine bay or fuse box. | Feature | Specification | | :--- | :--- | | **Operating Voltage** | 12V DC (Standard Automotive) | | **Max Current Rating** | 40A (Normally Open) / 30A (Normally Closed) | | **Contact Arrangement** | SPDT (Single Pole Double Throw) - 5 Pins | | **Coil Resistance** | ~70-90 Ohms | | **Terminal Type** | Plug-in / Blade (6.3mm) | --- ### 2. Internal Pinout Configuration The F2VF-4W2-R follows the standard ISO terminal numbering system. Understanding these pins is crucial for testing and integration. | Pin Number | Function | Description | | :--- | :--- | :--- | | **85** | Coil Ground | The "Negative" side of the trigger circuit. | | **86** | Coil Power | The "Positive" side of the trigger circuit (12V). | | **30** | Common (COM) | The main power input (High current). | | **87** | Normally Open (NO) | Connected to pin 30 only when the relay is energized. | | **87a** | Normally Closed (NC) | Connected to pin 30 when the relay is at rest (off). | --- ### 3. Key Electronic Features * **Suppression Resistor/Diode:** Most versions of this Ford relay include an internal resistor (typically 680Ω or 1kΩ) wired in parallel with the coil. This prevents **Voltage Spikes** (Back EMF) from damaging sensitive electronic control modules (ECUs) when the relay is switched off. * **Sealing:** The "-R" suffix often denotes a reinforced or ruggedized casing, providing resistance against vibration, dust, and moisture. * **Contact Material:** Usually Silver Tin Oxide ($AgSnO_2$), which offers excellent weld resistance and longevity during high-current switching. --- ### 4. Common Applications In Ford, Lincoln, and Mercury vehicles, this relay is frequently utilized for: * Fuel Pump activation. * Cooling Fan high/low speeds. * ABS Pump motors. * Headlight high beams. * PCM (Power Control Module) main power. --- ### 5. Testing Procedure To verify if the electronic components of the relay are functioning: 1. **Coil Test:** Set a multimeter to Ohms. Measure between **85 and 86**. You should see a reading between 70Ω and 100Ω. If it is "OL" (Open Loop), the coil is burnt. 2. **Continuity Test (Rest):** Measure between **30 and 87a**. There should be continuity. 3. **Operation Test:** Apply 12V to pin 86 and Ground to pin 85. You should hear a "click." While energized, check for continuity between **30 and 87**.