frearther wrote:I ran a new wire rather than relying on the already-too-small wire back there. It's not hard to go under the carpeting and into the trunk/boot. I also added a ground from the fuel pump to the chassis for the same reason.
I ran my electric fuel pump with a dedicated wire from the ignition switch to the boot for many years without difficulty. As part of my recent rewiring exercise, I ran a new wire alongside the regular body harness (runs in the left-side sill), and fed it from a relay rather than directly from the ignition switch. The relay is controlled by the ignition switch terminal that feeds the coil. I also fused the fuel-pump feed.
I try not to run components with a significant current draw - headlights, horn, fuel pump, heater fan etc. - directly through the old switches. Relays were designed for such tasks.