5 GT Turbo Fuel pump relay can anybody help me with how to test this properly

[chriscarine]

Hey people I had to bypass the fuel pump electrical system as it was not working properly can anybody give me any guidance on how to test this really properly so I can check whether it's working or not properly

 

[DaveL485]

I've always assumed that one is faulty if I have a problem, and bypassing it resolves the issue.

 

[chriscarine]

How would I go about bypassing ?

 

[DaveL485]

You just bridge two of the terminals on the wiring plug, I can't remember which colours I will have to go look in the garage later on, unless @Brigsy or @Adey can tell you

 

[Adey]

its been a while, remove relay and bridge between the red an white wires? I think they are on opposite corners of the plug. If it runs fine then i think you need to bridge between the yellow and white so it works with just the ignition on.

 

[chriscarine]

Okay so an update I've traced the fault back to a connector for the drivers foot bad connection so I've bypassed it now when I turn the ignition on the pump fires in and stays on I thought it was meant to prime for three seconds and then go off until ignition starts the engine then the pump kicks in constantly ?

 

[Adey]

It is. Sounds as if someone may have bypassed it already. Is there any extra wiring near the fuel pump relay? Or does the relay look like it has been opened up previously?

are you sure its the main pump?is the fuel light on?

 

[Brigsy]

Main pump does not prime, only works when the engine is cranking originally.

 

[Adey]

Main pump does not prime, only works when the engine is cranking originally.

Really?!

been a very long time since i had an Gt turbo. In my head they always primed

 

[Brigsy]

Really?!

been a very long time since i had an Gt turbo. In my head they always primed

Nope only work when the tdc sensor triggers the relay.

 

[Adey]

I stand corrected

 

[chriscarine]

I'm not a mechanic what is a TDC sensor as I may not have that plugged in as none of the cables were correctly labelled when my mechanic friend took the car apart and where can I locate it ?

 

[chriscarine]

I can't see any extra wires around main pump relay or auxiliary relay

 

[Adey]

TDC sensor is the trigger sensor that tells the aei (ignition module) when to spark. Its located on top of the gearbox near the joint to the block, it reads trigger teeth on the flywheel.

 

[chriscarine]

Now I've lost spark totally gerrrrrrrrrr

 

[chriscarine]

not sure What I've done but I'm not getting any spark spark plugs at all

 

[Adey]

did you fiddle with the tdc sensor? if that's disconnected you wont get spark

 

[chriscarine]

No I didn't touch that sensor I literally had it running this morning I swear this car is haunted lol could it now all of a sudden be that sensor gone ?

 

[chriscarine]

I have a spare Ignition module brand-new so I've swapped it out still nothing

 

[chriscarine]

Need to test the sensor out of the car see if it's faulty ?