A relay is basically an electrically operated switch. It takes a relatively small electrical signal and uses that to control a much larger one. Think of it like a gatekeeper – a little nudge opens a big door. It allows a low – current circuit to control a high – current circuit. They handle things like headlights, the starter motor, the horn – anything that needs a lot of power to run. They’re scattered all over the vehicle, mostly in the under – hood electrical center, but sometimes you’ll find them in the body control module area too. They're part of a circuit, sitting between the power source and the device they’re controlling. They don’t make the power, they just direct it where it needs to go. They’re often used where running a high – current wire directly from a switch to the device would be impractical or unsafe. They protect the wiring and other components. Without a relay, those high – current devices would put a huge strain on your switches and wiring, leading to overheating and potentially a fire. It acts like a shield for the sensitive parts of your system. You’ll notice if a relay goes bad because the associated device – a headlight, the starter, whatever it is – will stop working, or might work intermittently. Sometimes you'll get nothing at all. We carry a pretty good selection of these at Fixparts Online, and matching the right one is key. It’s usually labeled with a part number that makes it easier to find the correct replacement. Suitable for all conditions: Relay (MPN 31678440) includes a 12-month warranty!

About Volvo Passenger

Volvo Passenger is a premium Swedish brand renowned for its focus on safety and innovative automotive technology. Based in Sweden, Volvo Passenger continues to lead in advanced driver-assistance systems and passenger comfort.

Why Choose Volvo Passenger?

• Get parts made specifically for your Volvo – they’re designed to fit and work perfectly. • We use high-quality materials, so our parts are built to last and keep your Volvo running smoothly. • You’ll find a wide selection of parts, from everyday maintenance items to more complex components. • Choosing Volvo Passenger helps maintain your Volvo’s safety features and overall value. Performance you can rely on – Volvo Passenger parts from FixParts Online.