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Relays and Fuses

EFI Wiring Fundamentals

Discussion and questions related to the course EFI Wiring Fundamentals


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Hello,

I purchased a switch panel that came with its own pre-wired relay/fuse box, but I'm a little suspect of the way it is wired. It has the fuses between the battery and pin 30 of the relays. Will this work? I always thought you wanted the fuse between pin 87 and the device?.

Thanks,

Dennis

If the fuse is upstream of the relay then it protects the relay against overcurrent as well, not just the wiring to the device that is controlled.

Got it, thank you!