Fuel pump wiring upgrade help

[DSTX17]

I am installing an aeromotive 340 pump and purchased the relay kit from rally road. It is a Spal 195 Fan harness. I really have no idea how to wire this, can anyone assist with some photos?

[milKt]

You're installing a SPAL fan harness as a fuel pump relay?

[DSTX17]

yes..that is what rallyroad sells and recommends

[trthrrt489]

Pretty good write up here!

https://www.enginebasics.com/Advance...p%20relay.html

[chikinhed]

The only thing I’d add to that is that maybe use 40 amp relays instead of the 30 amp ones. I’ve replaced my 30 amp relays a couple of times from signs of getting too hot / melting plastic.

[dominator293]

I did a quick video of my surge tank setup which has a little bit of content about the fuel pump wiring in there (https://youtu.be/bWX9uQCQoNs). I have yet to fire it up to see if it works, but will be finding out over the next few weeks once I finish plumbing up intercoolers, oil coolers and the like. Once I confirm the pump works, I might do another video just on the wiring side of things.

Here is a rough guide of how I wired my yet to be tested fuel pump:
- The thick red wire (Terminal 30) goes directly to the battery positive with a fuse/breaker in between.
- The other red wire (Terminal 87) goes to the positive on the fuel pump.
- For the two smaller wires, I was told one goes to a switched 12v source (Terminal 86) which is any red/white cable running through the car.
- The other wire (Terminal 85) has to be run up to the engine bay and patched into the green/brown grounding wire coming from under the fuel pump relay.

Hope this helps!