Vn/vp Wirring diagrams

Wiring diagrams and questions
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Re: Vn/vp Wirring diagrams

Postby Humptydumpty » Wed May 22, 2019 12:49 pm

Can u give me a call mate?

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Re: Vn/vp Wirring diagrams

Postby Humptydumpty » Wed May 22, 2019 1:25 pm

Appreciate all the details but something must be wrong here..

There is power to the injectors (although wen I put a test light on one both pins lit the light up)

What I don’t understand (might be cause I’m not getting this back from ecu)

A relay needs x2 positives - one is direct from battery or through ignition at least - then there is a positive switching wire to switch the relay?

Then a earth then a power to item needing power.

I’m not getting power to switch the relay...

Thinking I might just wire the pump through a relay direct to ignition... is there a benifit of having it controlled through ecu?

Thanks heaps for your time and help mate!!!

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Re: Vn/vp Wirring diagrams

Postby Holden202T » Wed May 22, 2019 1:56 pm

its a safety thing, if there is no rpm the pump will stop, ie. if you have a crash.

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Re: Vn/vp Wirring diagrams

Postby Humptydumpty » Wed May 22, 2019 2:01 pm

Yeah ok I was thinking that might be the case

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Re: Vn/vp Wirring diagrams

Postby gtrboyy » Wed May 22, 2019 8:13 pm

Wire f/pump up to a switch if you don't think it's working.

Should hear it prime 2-3 secs then turn off.

Decade back when did my torrie could only get to do 2-3 prime but pump wouldn't stay...shrugged & fitted tachiometric relay

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Re: Vn/vp Wirring diagrams

Postby pman92 » Thu May 23, 2019 6:57 am

The ECU doesn't switch the relay power, it switches the earth.

You can switch a relay by providing power or earth or both. As long as you complete the circuit through the coil you have switched the relay.

You should have ignition power on 30 and 86, 85 should go to to ECU, and 87 goes to fuel pump
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Re: Vn/vp Wirring diagrams

Postby Holden202T » Thu May 23, 2019 12:01 pm

Stand Alone 808 Relay Wiring Diagram.png
Stand Alone 808 Relay Wiring Diagram.png (48.76 KiB) Viewed 506 times

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Re: Vn/vp Wirring diagrams

Postby Humptydumpty » Thu May 23, 2019 12:12 pm

Legendary

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Re: Vn/vp Wirring diagrams

Postby pman92 » Thu May 23, 2019 12:52 pm

Looks like I was wrong about the fuel pump relay.

Guess it's to prevent a short circuit to earth keeping the pump running
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Re: Vn/vp Wirring diagrams

Postby delcowizzid » Thu May 23, 2019 1:40 pm

Fuel pump is the only positive triggered output
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