School me on wiring

younggun2.0 said

Fuel pump is very basic, power supply from battery to relay. Power from relay to pump. Ground wires to chassis. Then a signal wire to relay. Either a 12v switch or a keyed hot. Msd box just as simple. Will have wire diagram on back of box.



Before you start anything google about relays and fuses. You are going to want to use relays and inline fuses when ever possible.

Click to expand...

Why...why??? I have been building cars for nearly forty years, and have never, ever even once considered adding a relay to ANYTHING.
And fuses? Only when absolutely totally necessary.
Anything you add to a cars electrical system presents another potential point of failure and complication to trouble shooting issues when they do arise.
And relays... Think about this for a second.
You are taking an electrical load that can be handled with a hard wire, and transferring it to a set of contact points, which will eventually dirty from arcing and reduce the quality of the circuit you are trying to improve.
Totally counter productive