How to wire fuel pump? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

FourtyKid · 12-24-2012, 01:43 PM

I recently bought an S13 project car. It has an SR20 in it. The battery has been relocated to the trunk (pretty shitty job, might I add). I'm still learning through this whole build and definitely need some help.

Anyway, here's the fuel pump wiring:

http://i.imgur.com/y7TtQ.jpg

For some reason, the four wires on the left are all cut. (Where the heck do they go to?)

The red wire you see goes to the positive on the battery, and the black one isn't connected to anything:

http://i.imgur.com/fJ696.jpg

If the black wire is touching the negative on the battery, there's a constant buzzing from the fuel pump. In order to start and run the car, the black wire needs to be touching the negative. If it's removed, the car dies.

Now I have no idea how to hook this thing up like it should be. I'd like to put a toggle switch or two in the dash for ignition and such. How do I wire the fuel pump to be on when needed and off when it's not, so it isn't constantly pumping/buzzing?

Also, there's a hissing sound by the engine, almost like there's a hose or something blowing air out. This is only when the fuel pump is connected to the battery and buzzing. What could that be?

12-24-2012, 01:43 PM	#1
FourtyKid Zilvia Junkie Join Date: Aug 2012 Location: Minnesota Posts: 517 Trader Rating: (11) Feedback Score: 11 reviews	How to wire fuel pump? I recently bought an S13 project car. It has an SR20 in it. The battery has been relocated to the trunk (pretty shitty job, might I add). I'm still learning through this whole build and definitely need some help. Anyway, here's the fuel pump wiring: http://i.imgur.com/y7TtQ.jpg For some reason, the four wires on the left are all cut. (Where the heck do they go to?) The red wire you see goes to the positive on the battery, and the black one isn't connected to anything: http://i.imgur.com/fJ696.jpg If the black wire is touching the negative on the battery, there's a constant buzzing from the fuel pump. In order to start and run the car, the black wire needs to be touching the negative. If it's removed, the car dies. Now I have no idea how to hook this thing up like it should be. I'd like to put a toggle switch or two in the dash for ignition and such. How do I wire the fuel pump to be on when needed and off when it's not, so it isn't constantly pumping/buzzing? Also, there's a hissing sound by the engine, almost like there's a hose or something blowing air out. This is only when the fuel pump is connected to the battery and buzzing. What could that be?