SR20 red top wiring question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

travypoo · 10-25-2010, 02:50 PM

Hey guys, I had a couple questions regarding wiring up the sr harness. I have went through the ultimate wiring thread and searched around quite a bit and I am still unsure. I currently have a 91 180sx that i pulled the sr from. I bought a 93 240sx that has been wired with a painless kit(car is a drift/track car only). I bought a wiring specialties SR into 240sx ecu wiring harness. The brown plug and the big grey plug that normally plug into the relay box under the hood will all have to be re wired to constant and switched power. however i am unsure of what to do with two of the wires that everyone says are needed to get the engine running.

The car has twin walbro fuel pumps that work off of switches, so is this wire even needed?
Black/Pink - fuel pump relay ground pin controlled by pin 104 of ECU, connect to ground pin of fuel pump relay, the ECU uses this pin to turn on and off the fuel pump relay

This wire also...should i be wiring up a relay in the ecu wiring, or where should this go if no relay is used?
Red/Black - ECU relay ground pin controlled by pin 4 of ECU, connect to ground pin of ECU relay, the ECU uses this wire to turn on and off an ECU relay that supplies main power to the engine

thanks for the help, hope these arent too silly of questions. i am somewhat new to wiring.

10-25-2010, 02:50 PM	#1
travypoo Zilvia Member Join Date: Jan 2006 Location: Edmonton Alberta Posts: 196 Trader Rating: (0) Feedback Score: 0 reviews	SR20 red top wiring question Hey guys, I had a couple questions regarding wiring up the sr harness. I have went through the ultimate wiring thread and searched around quite a bit and I am still unsure. I currently have a 91 180sx that i pulled the sr from. I bought a 93 240sx that has been wired with a painless kit(car is a drift/track car only). I bought a wiring specialties SR into 240sx ecu wiring harness. The brown plug and the big grey plug that normally plug into the relay box under the hood will all have to be re wired to constant and switched power. however i am unsure of what to do with two of the wires that everyone says are needed to get the engine running. The car has twin walbro fuel pumps that work off of switches, so is this wire even needed? Black/Pink - fuel pump relay ground pin controlled by pin 104 of ECU, connect to ground pin of fuel pump relay, the ECU uses this pin to turn on and off the fuel pump relay This wire also...should i be wiring up a relay in the ecu wiring, or where should this go if no relay is used? Red/Black - ECU relay ground pin controlled by pin 4 of ECU, connect to ground pin of ECU relay, the ECU uses this wire to turn on and off an ECU relay that supplies main power to the engine thanks for the help, hope these arent too silly of questions. i am somewhat new to wiring.