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Fuse and relays

EFI Wiring Fundamentals

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Discussion and questions related to the course Motorsport Wiring Fundamentals

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Hi, is there any consideration that is need to be taken about the position of the fuse respect the relay? For example lights.

Is the same effect if I install the fuse in the 30 pin line of the relay or in the 57 pin of the relay? Or for lights that has their own relay I must put the fuse on the 30 pin side?

Mu question is because I'm preparing a relay/fuse box and I'm attaching the 12v power core from Batery straight to a relay and then connecting in parallel the 12v power core to each relay (ecu, pump, lights, etc). And then I'm fussing the 87 pin for each accessory that I want to power by the relay. I know that with the ECU, ign, inj, fuel pump, o2 sensor, fun, its OK, but I'm not sure about lights and wipers for example.