Thread: Relays and Terminal blocks oh my

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Yep, I'd put all of the relays on that panel, labeled for the service. You'll have one relay for each switched service. The purpose of the relay is to keep from burning up your switch contacts for high load devices, like one for the fuel pump, one for headlights, one for electric fan (if you have one), one for the starter. You'll also have one for your "Accessories" circuit, which will be switched "ON" by your ignition switch "ACC" contact (the only place you have multiple devices powered from one switch contact, right?), and will have a healthy output contact capacity, especially if you're running an amplified audio system.