* Under the bonnet (hood): Often in a fuse box, either a main fuse box or a separate relay box. Look for a fuse box near the battery or in the engine bay itself. The relay might be clearly labeled, or you may need to consult a wiring diagram to identify it by its amperage or connection points.
* Inside the car: Less common for glow plug relays, but some models placed them inside the cabin, usually near the fuse box under the dashboard.
To find it, you'll likely need to:
1. Consult a Rover 400 diesel workshop manual: This is the most reliable method. The manual will have a diagram showing the relay's location and possibly its physical appearance.
2. Use an online parts diagram: Websites selling Rover parts often have diagrams. Search for a diagram specific to your year and engine.
3. Trace the wiring: This is the most time-consuming but potentially effective method if you have some electrical knowledge. Follow the wires from the glow plugs to see where they lead. This requires care to avoid electrical shock.
Important Note: Working with car electrics can be dangerous. If you're unsure about any aspect of this, it's best to take your car to a qualified mechanic. Incorrectly handling relays or wiring could cause damage to your vehicle or injury to yourself.
