Hello

I am trying to identify where a section of wiring loom is connected to.  Its a foil wrapped section clipped to the front sub-frame.

I am investigating an intermittent fuel pressure issue and i am curious whether if there were damage to this section - could this be connected.

 

I have attached a photo of where it runs on my car and also a photo from eBay which has the engine wiring loom for the same vehicle - with the same foil wrapped section.  Though i cant tell from the pictures where it runs from / to.

Any ideas, or diagrams that may help?

Thanks

Léon

Welcome!
What is the history here as we have just had another electrical issue request only to find out later that the vehicle was driven over concrete blocks!!!

There is the vaporiser fuel pump in that area but if you are using Forscan and finding a difference between demanded and actual fuel rail pressure, that is likely (but not definitely) controlled via a solenoid on the HP fuel pump via the PCM which is under the passenger font wing.
IS there any evidence of damage, now or in the past?

History and more details of this "intermittent fuel pressure" issue needed please?

And, when was the filter last changed etc?

Also, could you please correct your profile with year,, model, engine size, manual/auto etc. Thanks

On 7/18/2025 at 12:19 PM, Leonjudge74 said:

I have attached a photo of where it runs on my car

Well I've never seen a Ford Judge before, but at least I can see the underside now 🤣

On 7/19/2025 at 3:23 PM, unofix said:

Well I've never seen a Ford Judge before, but at least I can see the underside now 🤣

Such a shame there isn't an 'unhelpful' thumbs down 👎 option.

On 7/18/2025 at 2:26 PM, Shearers said:

Welcome!
What is the history here as we have just had another electrical issue request only to find out later that the vehicle was driven over concrete blocks!!!

There is the vaporiser fuel pump in that area but if you are using Forscan and finding a difference between demanded and actual fuel rail pressure, that is likely (but not definitely) controlled via a solenoid on the HP fuel pump via the PCM which is under the passenger font wing.
IS there any evidence of damage, now or in the past?

History and more details of this "intermittent fuel pressure" issue needed please?

And, when was the filter last changed etc?

Also, could you please correct your profile with year,, model, engine size, manual/auto etc. Thanks

The wiring is for the vapouriser fuel pump and the vapouriser glow plug.

There is a plastic cover (not shown in this image as it's removed) which is damaged. The cable in question runs behind that plastic cover hence asking (back then) if anyone knew where it ran. The original fuel rail pressure issue was resolved - leaking injector seals.

In diagnosing a seperate DPF regen issue I've dug deeper. There is a DTC for Fuel Vapouriser Circuit Low and the pump isn't working. I have sourced a replacement pump which I am waiting to arrive. I'll update again here if that solves this secondary issue.

Cheers

I assume you have checked the fuses as a Tech told me he has never know a pump to fail of course there's always a first time?
I think there's one for the glow plug (F6, 20A?) and one for the pump (F9, 5A). These may be different on yours?

How did leaking injector seals affect the fuel rail pressure?

Edit: The pump works on current pulses, it doesn't have a motor so how was it tested and confirmed bad?.
Also, if the glowplug has low resistance but within spec (even at 0.8 Ohm) it may blow the fuse which could be F2 -the handbook isn't very helpful?
What is the exact code?

1 hour ago, Shearers said:

I assume you have checked the fuses as a Tech told me he has never know a pump to fail of course there's always a first time?
I think there's one for the glow plug (F6, 20A?) and one for the pump (F9, 5A). These may be different on yours?

How did leaking injector seals affect the fuel rail pressure?

Edit: The pump works on current pulses, it doesn't have a motor so how was it tested and confirmed bad?.
Also, if the glowplug has low resistance but within spec (even at 0.8 Ohm) it may blow the fuse which could be F2 -the handbook isn't very helpful?
What is the exact code?

The pump has a motor.

The fuses have been checked as has the wiring back to PCM.

Just now, Leonjudge74 said:

The pump has a motor.

The fuses have been checked as has the wiring back to PCM.

The glow plug is fine, it's not blowing fuses.

The fault code is specifically the injector fuel pump (vapouriser) not the glow plug (vapouriser).:

It's therefore either PCM, wiring or vapouriser fuel pump.

5 minutes ago, Leonjudge74 said:

The pump has a motor.

As I understand it, although there's always a possibility it changed, the pump works on a pulsing principle that controls the rate of fuel injection.
So it is a coil that will have a resistance that can be measured at the pump then back to supply wiring/PCM but I'm always ready to be convinced otherwise?