Instead of a dedicated relay, various smaller relays control individual components *related* to the engine's operation (fuel pump, glow plugs, etc.). These relays are often located in fuse boxes, typically under the hood (bonnet) and sometimes inside the car's cabin.
To find the relays you need, you'll need to:
1. Consult your vehicle's owner's manual: This is the best source. It will show you diagrams of the fuse and relay boxes, and indicate which relay controls which component. Look for diagrams relating to the fuel pump, glow plugs, or other engine-related systems if you're having a specific problem.
2. Check online forums specific to your Ford Mondeo year and model: Searching forums like Ford forums or others dedicated to your Mondeo's year and engine code will likely provide pictures and locations from other owners who have had similar issues. Be sure to specify your exact year and engine code (e.g., 2.0 TDCi, 1.8 TDCi) for accurate results.
3. Use a wiring diagram: A wiring diagram for your specific vehicle will show the location and function of all relays and fuses. These can sometimes be found online (often for a fee) or through a mechanic.
Important Note: Before replacing any relay, it's crucial to correctly diagnose the problem. Replacing a relay randomly might not fix the issue and could even damage other components. If you're experiencing engine problems, it's best to seek professional help from a qualified mechanic to avoid further complications.
