Hr34 fuel pump not turning on

[Trinicandian]

Hey guys. New here. I am having an issue with my hr34.

The fuel pump isn't turning on.

I removed it from the tank. Bench test it. Wasn't working. Order new one and installed it today. Still not turning on.

Checked the relay. Relay has voltage on the contact side. I jumped it and it tuned the pump on. Which lead me to checked the coil voltage. 

Turned on the ignition and had my meter across the coil and there wasn't any dc voltage. Had my meter lead on the positive and I used the frame ground and noticed there was 12 volts. Which lead me to believe the relay isn't getting a negative signal. I traced the wire ( black with pink strip).it goes back to the bottom on the steering and it gets lost into the harness.

 

I checked at the ecm and I can't seem to find that wire color.

 

My question if any one knows is. Can I not just run the negative through a ignition relay to turn on the fuel pump relay?.

Or anyone ever had this issue and if so how did u go about fixing it.

 

 

[GTSBoy]

The answer is to get a hold of the wiring diagram, work out what voltage is supposed to be where, when, and then work out why it is not there, then.

I can't speak to the HR34 stuff, because I have never paid any attention to the NAs. There is a possibility that the turbo diagram will help, but it could also be different - depending on whether there is an FPCM on the NAs.

[Duncan]

If you get 12v at one of the relay pins with IGN on, and 12v at another for about 3 sec when you turn the key from ACC to start, then yes you can just earth the relay trigger pin.

Just have a look at the top of the relay, it should tell you which pin needs earth when the 12v signal is sent (or if it's not clear, just post the pic and we can work it out).

If you always have 12v at 2 pins with IGN on, they it is earth triggered by the ECU which makes it harder to fix (you really need to check the ECU pin is earthing when it should, and if so it is a wiring issue from there to the relay.