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Fuel Pump Issue (Negative Trigger Relays)


J001

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I’ve got the following problem if anyone is able to help

 

2 relays wired negative trigger for the fuel pumps in the swirl pot.

The relays are staying latched with the vehicle off,

They’re both wired up with their own fused perm live from battery to pin 30 with a jump wire to pin 86

Pin 87 provides power to the fuel pumps 

Pin 85 is the only shared wire and is the negative trigger from the ECU (G4x Fury)

The fuel pumps are earthed directly to the chassis

As soon as I add the fuse into the perm live with the ignition off, the relays they turn on

My guess is that the pumps are back feeding and holding the relay closed 

Is there a way I can stop this?

Appreciate any help 

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The coil supply (86) should be ignition switched +12V for a normal aux.  If you have a spare ignition or injector outputs you could move your relay trigger to them as they are ok to have a live feed. 

OAQI7bY.png

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