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Mk5a immobiliser help?

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Hi all, 

Cvh Mk5a si cab won't start.  Hasn't moved for a couple of years but looking at the weather about time it was! 

Turn the key and the relays click but no ignition lights, no fuel pump prime and no starter engaging. 

I know there's a Ford fitted immobiliser but nothing else.  Tried locking and unlocking a few time's and nothing. Tried leaving the key in the ignition for 5 mins and nothing.  New battery fitted.  All fuses checked twice. 

All wiring in the engine bay looks good (not fractured or snapped) 

Dash light (next to clock) is on when I lock up and goes out when I open it.  All other electrics seem to work on ignition, head lights, blower, windows. 

So at a loss and the cars not worth paying an expert to look at it. 

Good news is I can take my battery back. 

Any ideas folks would be really appreciated. 

 

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Have you double-checked that all the earth cables are connected as there is one which usually falls down the back of the battery tray.

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Yep double checked the earths.

Made a bit of progress, now have ignition lights and the starter motor is engaging but no spark. 

Going to up plug all connections I can find and try a bit of wd40 and cross my fingers again.

No spark could still be imobiliser as I cant remember how the thing works.

I will post updates if when I find the problem!

Cheers

 

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Is it turning over now then ? Can you here the fuel pump prime ? If so take a spark plug out to see if you have a spark when turning over.

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Convinced myself it's an earth issue as sometimes it'll turn over then other times nothing.  Sometimes the ignition lights and nothing and sometimes just nothing at all!

In addition the electric windows are working without the ignition.

On my mk3 and 4's the fuel pumps prime but can't ever remember the mk5 doing this.  I know the relays are different from the 3/4 to the 5 and I know the pumps is no longer under the tank so convinced myself that it doesn't have an audible prime.

Can't see any obvious rusty or in-attached earths so back to head scratching.

Had the fuse box out and can't see any burned tracks or dry joints but that could be down to my eyesight!!!!

All relays have been swapped.

And I seem to have aged 2 years in 2 weeks.

I will update when I do eventually figure it out.

 

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My dad soldered the whole fuse box on our mk5 sorted out a whole multitude of syncs was well worth doing if you got the time and patience 

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Thanks for the advice, those fuse boxes are a pain in the backside but hoping it was something else. (Bangs head off wall).

Due to the summer disappearing fast I've moved back to my mk3.  I will post again when I get the 5a sorted.

Cheers.

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