TPI TERROR

iTrader: (52)

as many ls swappers have a basic understanding of wiring and sodering i wanted to attempt to build my own wiring harness for duals currently running a single, i have seen several people run the fuel pump relay differently switching terminals 85 and 86.

from my ls1 swap notes this is how i usually wire up a relay for fuel and iirc this is how i ran my current single fuel pump

terminal 85 connect to pcm red 9
terminal 30 connect to fuel pump input
terminal 86 connect to ground
terminal 87 connect to switched 12v power supply with fuse


for the dual would this be correct ? terminal numbers are inside image . contant 12v will have 20 a fuse , plan on running 12 or 10 gaueg wiring and good relays. battery mounted out back

Crf450r420

iTrader: (1)

Most ECU controls are grounds, so you will probably need to supply positive to 86 instead.

brandon6.0

iTrader: (32)

I wanna say the fuel pump output is 12v supply. Everything else is usually grounded from the pcm.

JoeNova

Fuel pump is 12v supply from PCM, not ground.

Crf450r420

iTrader: (1)

Now that you guys say it. I remember wiring a 12 volt to activate the stock relay. Sorry, that was almost 2 years ago I was working on that last.