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Home > Help Needed / General Tech Chat > Crank sensor wiring

tadge44

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Buckinghamshire

I., sorting out the Megajolt for the van and am using a SC bracket and trigger wheel with the Magneti Marelli crank sensor, which fits the bracket, as intended.

Its the same sensor is used by Cosworths (and others) and came with a two pin female plug. I need to extend the lead and cut off the the plug as I dont have the corresponding male part anyway.

There is a blue wire and a black wire - which is the positive one - anyone please ?


wng691s clubby

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Cleethorpes

mine has the symbols on the plug case if that helps

Done now needs redoing lol


Tom Fenton
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

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Rotherham South Yorkshire

Male half of the plug is easy to get, personally I would not disturb the OE wiring on the sensor, then if you ever need to swap the sensor it's an easy unplug-plug in job, no wiring mods needed.


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


tadge44

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Buckinghamshire

Even with the male plug I would need to know which was the positive connection though.


Rod S

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Rural Suffolk

David,

I agree with Tom, don't cut it...

But the colours do not match my Cossie wiring diagram anyway, the crank sensor on the Magneti/Marelli ones (before Ford did their own) should be brown and green.

But I've had problems with Ford's manuals just recently as Tom will confirm :)

Also, the Magneti/Marelli sensor reads a four tooth wheel (on the Cossie), not a 36 tooth so may not be happy with a 36. (the Cossie cable is NOT screened because of the lower frequency).

Maybe yours is from a later one but I thought when Ford dumped the Magneti/Marelli system, they dumped everything in favour of their own.

But again, I could be wrong.

Are you sure it's a Cossie sensor you have, Magneti/Marelli did lots of stuff for other cars ???



EDIT - typos

Edited by Rod S on 28th Mar, 2013.

Schrödinger's cat - so which one am I ???


Sprocket

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Preston On The Brook

Pin one is usualy posative

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


Tom Fenton
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

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The Cosworth type Marelli sensor has been tested with a 36-1 wheel to nearly 9500rpm on the DON so no worries on that score!


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


Tom Fenton
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

&

TM legend.

Rotherham South Yorkshire

I can't remember exactly from memory, but what you need is a Junior-timer male socket, now I think its a 2-pin one, BUT its not unknown for them to use a 3 pin housing (physically wider) with just the two pin recepticles in use.


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


apbellamy

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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

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It's the 2 pin one. I made an extension up for mine recently. I just bought a male and female junior timer connector and made a straight extension. Was a PITA to put together, but should do the job nicely.

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


gr4h4m

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Chester

The ford plug seems to fit my new sensor...

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


nala56

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As above..

Main Build
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=489133

Upgrade to Turbo
http://www.turbominis.co.uk/forums/index.p...tid=448367&fr=0


nala56

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Sheffield South Yorkshire GB.

Andy put me on to my new sensor and as I say it fits my ford plug, but he says I will have to reverse the wires so will do it at the Enis end where I have snap connectors, will I be ok to try without any damage to find the right polarity? Anyone know please.. Alan

Main Build
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=489133

Upgrade to Turbo
http://www.turbominis.co.uk/forums/index.p...tid=448367&fr=0


Rod S

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On 28th Mar, 2013 Tom Fenton said:
The Cosworth type Marelli sensor has been tested with a 36-1 wheel to nearly 9500rpm on the DON so no worries on that score!


Tom, I'm sure you are right but, like me, I'm sure you use an adaptive ECU.

EDIS (which MJ uses to read the crank signal) is seriously old.....

So "may" not be happy with a VR sensor intended for different speeds.

I have no evidence one way or the other but I would tend to err on the side of safety and use the VR sensor intended for EDIS on an MJ install rather than something that wasn't used on EDIS.

Just my opinion....

Schrödinger's cat - so which one am I ???


wil_h

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Betwix Harrogate and York

On my sensor there is a '+' on the plug. this equates to pin 2 on the female socket.

They are minitimer 2-pin, like these http://www.efi-parts.co.uk/index.php?categoryID=84

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


tadge44

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Buckinghamshire

This SEN8D sensor is the one supplied by SC to go with their bracket and trigger wheel for An A series MJ installation, so I guess it will work.

As nala56 says, will it do any harm to try connecting it either way just to see which way works ?


gr4h4m

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Chester

Right I wired mine yesterday and I can confirm its back to front.

For the car to fire I had to put the negative from the Edis unit to the plus shown on the sensor plug. Then brum brum!

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


tadge44

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Buckinghamshire

So no harm done if its wired up wrong in the first place ?.


gr4h4m

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Chester

Nope as it tried it the other way first

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


lee.pb

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Lancashire

so is the positive, the one closes to the mounting lug or vise versa *oh well*
just started wiring loom for MJ today and was one of the questions i wanted to ask.

could someone confirm the picture below is correct for the coil pack connections.

spark output A to pin 10 on Edis4
spark output B to pin 12 on Edis4

sorry for the hi-jack


Attachments:

What the mind can conceive the mini can achieve
MITP 2012 17.01 seconds 1/4 mile against "The Don"
MITP 2013 16.83 seconds 1/4 mile


nala56

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Sheffield South Yorkshire GB.

The top wire in your photo goes to pin12, middle wire goes to 12v suply, the bottom wire goes to pin 10.. Alan

Main Build
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=489133

Upgrade to Turbo
http://www.turbominis.co.uk/forums/index.p...tid=448367&fr=0


lee.pb

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Lancashire




On 31st Mar, 2013 nala56 said:
The top wire in your photo goes to pin12, middle wire goes to 12v suply, the bottom wire goes to pin 10.. Alan


cheers alan, i suppose if you got it wrong you could just swap the pug leads over. *surprised*

still need help with vr sensor gents, i'll check the colours and post *happy*

What the mind can conceive the mini can achieve
MITP 2012 17.01 seconds 1/4 mile against "The Don"
MITP 2013 16.83 seconds 1/4 mile


lee.pb

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Member #: 9199
Post Whore

Lancashire




On 31st Mar, 2013 nala56 said:
The top wire in your photo goes to pin12, middle wire goes to 12v suply, the bottom wire goes to pin 10.. Alan


cheers alan, i suppose if you got it wrong you could just swap the pug leads over. *surprised*

still need help with vr sensor gents, i'll check the colours and post *happy*

What the mind can conceive the mini can achieve
MITP 2012 17.01 seconds 1/4 mile against "The Don"
MITP 2013 16.83 seconds 1/4 mile


lee.pb

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Post Whore

Lancashire

wires coming off the VR sensor:

Brown with red tracer.
White with red tracer.

What the mind can conceive the mini can achieve
MITP 2012 17.01 seconds 1/4 mile against "The Don"
MITP 2013 16.83 seconds 1/4 mile

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