Wiring Q's

Kenn · Post by **Kenn** » Sun Feb 19, 2006 9:05 am

i'm in the process of wiring up my EDIS/MJLJ using this diagram http://picasso.org/mjlj/?q=node/606 and need to know what the 25pf is on the 12+ feed and how the rev counter diagram at the bottom of the page works? i'm only running a single coil but don't know what i need to get it working.

any help appreciated.

MartinM · Post by **MartinM** » Sun Feb 19, 2006 9:39 am

I can partially help - the 25uF capacitor is not needed. There is a discussion elsewhere (use Search) on what it's for, but it's not necessary.

No good at rev counters I'm afraid. My advice would be to get the MJLJ going and then sort out the rev counter...

Kenn · Post by **Kenn** » Mon Feb 20, 2006 7:53 pm

THANKS

PioneerX · Post by **PioneerX** » Tue Feb 21, 2006 12:19 pm

Just to clarify the 25uF cap is not required but is included (by Ford) as radio suppression in the coil circuit. I personally have kept it in the orginal wiring loom (the small grey block about the size a match box) to avoid radio problems.

I guess it is up to you if you include it or not.

Kenn · Post by **Kenn** » Thu Feb 23, 2006 10:24 pm

do you know where abouts on the original loom it would be? been down to the scrapy today but couldn't see one.

Kenn · Post by **Kenn** » Thu Feb 23, 2006 10:32 pm

do's anyone know what the symbols mean in the waste spark conversion circuit?

MartinM · Post by **MartinM** » Fri Feb 24, 2006 9:25 am

What waste spark conversion circuit? As before, I wouldn't bust a gut trying to find a capacitor.

Kenn · Post by **Kenn** » Fri Feb 24, 2006 11:15 am

the one at the bottom of this page http://picasso.org/mjlj/?q=node/606

my mk2 golf requires -VE coil signal to run tach.

PioneerX · Post by **PioneerX** » Fri Feb 24, 2006 11:35 am

MartinM, I'm with you on this one, the cap is by no means a requirement, it simply provides the smoothing of the -ve line on the coils (the line where the physical power drawn from). I only kept the cap bacuase I used the orginal ford loom for the EDIS side. There would be no detrimental effect to not having it in the ciruit.

MartinM · Post by **MartinM** » Fri Feb 24, 2006 1:33 pm

The two on the left are standard rectifier diodes, the one on the right is a zener diode. Assuming you're in the UK (correct?) you can get them from Maplins...

Kenn · Post by **Kenn** » Fri Feb 24, 2006 2:42 pm

thanks for that!

and yes i'm in the uk.

Kenn · Post by **Kenn** » Fri Feb 24, 2006 2:54 pm

just been on the site but don't know which one's would be suitable.

http://www.maplin.co.uk/Search.aspx?cri ... &source=15

http://www.maplin.co.uk/Search.aspx?cri ... &source=15

as you might be able to gather i'm new to all this electrical stuff so thanks for you assistance.

MartinM · Post by **MartinM** » Fri Feb 24, 2006 3:07 pm

Hmmm...Maplins not as good as I remember!

I'd use AY72P for the Zener and a pair of N78CA for the rectifiers - both are higher spec that the ones in the diagram so you'll be OK

The bands on the actual components equate to the vertical bar end of the circuit symbols, by the way

Kenn · Post by **Kenn** » Fri Feb 24, 2006 3:35 pm

so let me get this straight.

to get my mk2 golf tach/rev counter working i need to connect up the -VE coil 1. as i'm only running one coil (where do i get this from or is it the rev counter wire from either EDIS or MJLJ?) then connect that to a rectifier diodes then to a zener diode and then to my rev counter?

making sure the components are wired in the correct way round?

MartinM · Post by **MartinM** » Fri Feb 24, 2006 4:41 pm

OK, the diagrams aren't quite consistent...

Coil 1 and coil 2 on the tacho circuit are coil A and coil B on the wiring schematic - so you DO have two coils. One is pin 10 on the EDIS and the other is pin 12.

And yes, make sure the components are the right way round!

Autosport Labs

Wiring Q's

Wiring Q's

I can partially help - the

THANKS

25uF cap

25uF

rev counter?

What waste spark conversion

the one at the bottom of

MartinM, I'm with you on

The two on the left are

thanks for that!and yes i'm

maplin?

Hmmm...Maplins not as good

so let me get this straight.

OK, the diagrams aren't