I found a wiring relay harness for the holley blue fuel pump that i plan to run on my car. IT COSTS 80 BUCKS. is there any cheaper solutions out there for wiring in a relay with fuse and wires? is it worth saving the headache to just get the harness from holley?
Yes, just use a common 12 volt 30Amp automotive relay available ANYWHERE, and wire it up. 12 volts to Pin 87 comes directly from the battery with a fuse in line. 12 volts to the switch comes from a 12 volt switched source from the fuse block.