Fuel Pump Fuse Keeps Blowing??

[SkylineR32GTS-T]

so my 92 r32 gtst keeps blowing a fuse everytime i turn the ignition to the on position which in turn stops the fuel pump from turning on im really running out of options so im leaving up to you guys to help me out or give me any info on what to do

[SkylineR32GTS-T]

can someone just show me or take a pic or tell me where the fuel pump relay is im having alot of troubles this is my only vehicle could really use some help i narrowed it down to a problem getting power to my fuel pump trace all the wires to find no short so it has to be my relay but i dont know where the fuel pump relay is all i found on here was the pin out diagram for the ecu if someone could help i would be fo ever grateful

[Skym]

I was told by auto sparky that ignition fuse can blow without the earth on ignition module. I would assume this is what is happening on your car. So could be like you have said, shorting, touching / earthing directly to chassis which you have checked wiring for lack of earth. From memory, relay should have a earth and is connected to IACV that won't function if relay doesn't work.

I always thought you traced wiring from fuelpump to drivers side rear 1/4 and find the relay on those wires.

[SkylineR32GTS-T]

do u happen to know what color it is???? and are u saying its behin the seat or rear insert panel on the left side???

[overboostedlebaron]

pretty sure its green and its to the right of the trunk release

[SkylineR32GTS-T]

thnx guys but im not sure if u mean the trunk release lever by the drivers seat??? if so i didnt see any green relay

[Skym]

I always thought relay was under the aluminium bracket (looks similar to a ballast resistor pack) that's on bottom of boot, next to fuelpump access hole. But some say the relay is in the drivers side 1/4 panel, behind the boot trim. Never had problems with relay, so haven't had the need to look for it. But I know it's connected to IACV via looking at wiring diagram.

[SkylineR32GTS-T]

i looked where u guys have said and havn't seen anything even checked beside the IACV the only place i seen relativly close to a green relay was two behind the ECU but im almost positive not one of them in the relay so i dunno it doesnt seem like i can get a straight answere as to where the fuel pump relay is located ive checked other skyline forums on the internet to come up with nothing

[Skym]

As far as I know not beside IACV, power for IACV is connected to fuelpump relay. Power to fuelpump relay comes via ignition barrel, fuse, but can be interupted via ECU / Consult to turn fuelpump off when you want to run engine (fuelpump relay power supply can be interupted by ECU, pinout number 18 on a RB25DE engine ECU plug) to clear fuel lines of fuel before changing fuelfilter, injectors, etc. Earth for fuelpump relay seems to be through IACV earth or earth off ignition barrel. I assume one of those 2x earths is the culprit of fuse blowing. Sometimes devices like turbo timer can be earthed off the ignition barrel earth and might cause fuse to blow.

Also this thread on SAU has lots of info on fuel pump mod and different ways to do it with lots of DIY diagrams -

http://www.skylinesaustralia.com/forums/Fuel-Pump-Direct-Feed-Rew-t91993.html&pid=4108172&st=180

[overboostedlebaron]

im pretty sure its in the trunk . maybe tomorrow ill take some pictures for you. you have to remove some of the trunk panels to see it but it is to the right of the trunk release latch.

[overboostedlebaron]

here

[SkylineR32GTS-T]

thanx a bunch dude i had a feeling it was the relay for my pump thnx man

[SkylineR32GTS-T]

k so new problem why wouldnt i be getting power to my fuel pump fixed all the grounds and put a new relay in but im still not getting power to it can u guys tell me why that would be oh and its not blowing fuses anymore but still nooo power

[SkylineR32GTS-T]

does this mean my ecu is done for if im not getting power to my relay ???

[NismoS-tune]

Sorry to hear... It's always sad when a person has to rely on a 20 year old car that has little to no parts support locally, as a daily driver. Atleast there's the bus. You should see this as an obvious message that it's time to buy something that is easily serviceable/reliable for daily driving. I take the bus so my other vehicles are not primary. It's always why I can easily stay under 10,000km a year on the truck and 4000km a year on the car while still enjoying them on my days off

Next time it breaks, you won't have to scramble to get it fixed