School me on wiring

whitepunkonnitro said

That doesn't make any sense. The keyed power source will trigger the relay, yes..but the pump still needs a power source and ground. You have not circumnavigated a potential problem, only added an extra circuit to it.
There is a bank on the fuse block that is protected by the fusable link, fed by the key, and intended to carry amp loads similar to what an electric fuel pump will draw.
Piggy back from that and all is well.

Click to expand...

I'm sorry white but I really have to disagree ...ANY high current load like cooling fans , fuel pumps , etc. should always be isolated on a relay ... This way the battery is providing direct high current feed (or the alternator while running ) to that component . Otherwise you are ruunning all your high current consumers thru components not meant to deal with those loads ... Like the ign switch and main fuse block . Relay contacts are very very durable , switch contacts however have limitations ,and are prone to developing high resistance as compared to a quality relay.

Also did you say fuses are a waste of time ? I'll have to reread your post but certainly that would be the most irresponsible incorrect statement to put out there .