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MK7 Won’t Start No ignition Lights

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MK7 Won’t Start No ignition Lights

Postby Nkxtc » Mon Apr 19, 2021 8:09 pm

Hi today old faithful decided fart and collapse on itself. Started running weird like it missing and the dash lights all lit up speedo wasnt moving so pulled over and switched off s and tried to restart. There was nothing just solenoid click. No lights on the dash which is really strange only a quick flicker. Managed get it to go tho and limped to the job I at. Luckily it a pal so he understood when I had to try get it started again. It didn’t though and I’m at end of my tether with it.

Put in a new battery few weeks ago as I was having trouble starting, it did the constant clicking but after a few tries it would always fire. Turned out new battery didn’t really make a difference but was marginally better

There is an oil leak going around starter so thought it getting junked up so been cleaning and today it really went for it and after 4 hours tinkering I couldnt turn it over however after a while i found if I removed R5 relay it would turn over but it won’t fire up. If I turn ignition with relay on it clicks solenoid and roughly 8 clicks come from BCM. Taking out R4 stops it turning over. Swapping relays over has no effect it just clicks.

The immobiliser light at one point flashed very fast but now just a constant flash.

All fuses tested they all ok. I tried what I read in another post about giving dash 12v at fuse 66 but that didn’t do anything.

My head a little fried after being at this all day so hope it makes sense.

Anyone had this before. Is it a faulty relay or bcm or battery or wiring or just tile I retire the thing it is 14 year old.
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Re: MK7 Won’t Start No ignition Lights

Postby knobby1 » Mon Apr 19, 2021 9:00 pm

Ignition switch is a common fail on these...Cheap and easy to try.

Lord Knobrot
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof.

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: MK7 Won’t Start No ignition Lights

Postby Nkxtc » Mon Apr 19, 2021 10:07 pm

Cool that thought crossed my mind as it’s like it loses connection but it’s weird taking the relay out let’s it turn. Can’t find much info about what it doing.

Thanks
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Re: MK7 Won’t Start No ignition Lights

Postby fortyeight » Mon Apr 19, 2021 10:25 pm

bad earth
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Re: MK7 Won’t Start No ignition Lights

Postby Nkxtc » Mon Apr 19, 2021 10:46 pm

I also thought that so tried a jump lead form negative terminal to the engine block and no difference. One earth at the crossmember has a green build up and the one on starter had lot of oil from the leak tried sole brake cleaner and they seem cleaner but not any more luck
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Re: MK7 Won’t Start No ignition Lights

Postby Nkxtc » Thu Apr 22, 2021 6:47 pm

Little update after AA looked at it with no luck and ended with a recovery now garage has it. Wasn’t the ignition switch as one was tried but no different. All fuses and earth wirings checked still nothing. Can’t connect a computer to it as no ignition. It’s now looking ominous and garage say could well be dash at fault. If so vans probably getting scrapped as not worth the cost due to Ford would need code it to van. Unless anyone any other ideas? Engine turns over still if remove relay R5 but not when it’s in. Won’t fire up but I presume with no ignition immobiliser not allowing it. Relay been tested it’s fine.

Has everyone stumped so far...
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