Fuel Relays Not Energising

[HQLex]

Hi, I am putting a crown V8 in a HQ. I have followed the wiring diagrams posted here but Im having trouble getting the fuel speed relays to operate. The main relay enables when the ignition is turned on but neither of the fuel pump relays energise to start up the fuel pump. The engine check light is not on. Does anyone have any ideas or areas I can check, thanks.

 

[edz]

fuel relays not working

HQLex - are you wiring the crown without the auto following Zuffen's simple wiring diagram? Sounds like you haven't got an earth connected. I wired mine up on the garage floor following his diagram and it worked ok. The important bit after the earths is the master power relay is triggered by the ecu to energise the rest of the relays, do the relays click on and off?

 

[HQLex]

I checked all the earths I could find, made sure they were tight, tested the continuity and all were good. I only have the master power relay being energised, all other relays are off, the outputs from the ECU to energise the relays are just floating at around 200mV