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MD5



Member Since: 02 May 2011
Location: Italy
Posts: 143
2009 Defender 110 Puma 2.4 SW Alpine White
Solenoid Wiring - Help Needed
I'm almost ready to install a Genesyz Dual Battery Management Unit but I need wiring assistance because my kit come with a much stronger Albright SU280 solenoid instead the weak factory supplied.

In the pics below you will se the factory solenoid wiring scheme on the top and the Albright SU280 image on the bottom


Click image to enlarge

The factory solenoid is connected as follow:

1 = Main battery
2 = white - solenoid positive
3 = ground
4 = Aux battery

The Allbright solenoid come with a + sign on the right.

Any wiring how-to help greatly appreciated, thanking in advance.
Post #90460 21st Sep 2011 7:37pm
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pom



Member Since: 01 Jun 2010
Location: Worcester
Posts: 1343
Well it looks from the instructions the positives + from each battery to the large terminals 1 & 4, I guess its earthed through the body ?

My winch has + and - fat cables both back to battery though.

Pom
Post #90475 21st Sep 2011 8:17pm
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christyler



Member Since: 10 Dec 2010
Location: Cork, Ireland
Posts: 67
Just ignore the "+", that only matters if your solonoid has aux contacts, and yours dosent.

the two big terminals are just a switch (they join together) and the small ones are the coil, the coil will work any way round.

i would put a diode across the coil terminals as well if i was you, it stops any nasty spikes caused by back emf getting to your electronics when the coil is energised.
Post #90524 22nd Sep 2011 12:34am
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MD5



Member Since: 02 May 2011
Location: Italy
Posts: 143
2009 Defender 110 Puma 2.4 SW Alpine White
Thanks for your assistance!
To recap, the wiring scheme of the new Albright solenoid is the same as the factory one ?

Which kind of diode you suggest ? Do I need to put the cathode on the left or right small terminals ?
Post #90526 22nd Sep 2011 5:32am
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ethanicus



Member Since: 11 Jan 2013
Location: Surrey
Posts: 94
2014 Defender 90 Puma 2.2 XS CSW Corris Grey
Hi All,
I am just about to do the same, what diode should I use? I have some standard 12v 5w zener diodes to hand, will they be ok.

Cheers
Post #593308 15th Jan 2017 8:27pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19535
United Kingdom 
MD5 - Anode - Positive. Cathode - Negative.

I was looking at this the other day, however, it's very confusing as to which diode to use.
There are Durite versions not on eBay, that are mini fuses that go in mini fuse holders.
Many seem 100v or 150v, which I see as pointless as surely you'd not want any voltage spike above 50v max....

I don't mind admitting that I'm not an expert as to all the different diode types and equirements.
I was thinking of fitting similar to the OP but for an ignition switched Live feed up to 100A
Durite HD make / break relays have not diode built in like some smaller ones do. Diesel$ Live$ Matter. ⛽️🛢️👨‍🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧
Post #593314 15th Jan 2017 8:37pm
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VeeTee



Member Since: 06 Mar 2011
Location: Somewhere
Posts: 1512
Netherlands 
The flyback diode does not literally protect against voltage spikes, but it prevents spikes being generated when the coil is deactivated. Therefore it does not have to be a big diode of high voltage, a generally used type like the 1N4001 (50V/1A) is OK. Here is a good explanation how it works. Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold)
1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold)
1975 Series III 88 V6, Light Green (sadly sold)
1996 Defender 110 CSW 300 Tdi, Epsom Green (sold)
2000 Freelander 1 TD4 3-drs, Silver (sold)
2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold)

MySite
Post #593339 15th Jan 2017 9:09pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19535
United Kingdom 
VeeTee - This is what I was looking up last night.
One reason I'm also going to change my spot light Relay over to a type with in-line diode built in.
I don't like the idea of fitting LED headlights with EMF creating spikes up to nearly 200v is possible.

That is fine fir mini relays but HD types seem to have no diode built in and seem to have a 300mA coil which is larger thus creates even more EMF current to dissipate.

Would this suit fitted parallel in this instance for me and the OP?

http://www.ebay.co.uk/itm/1x-Durite-Diode-...SwQItT6L1P

There is a 10A in-line version too, but typically they are fitted in parallel with the coil not in-line. Diesel$ Live$ Matter. ⛽️🛢️👨‍🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧
Post #593364 15th Jan 2017 10:08pm
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ethanicus



Member Since: 11 Jan 2013
Location: Surrey
Posts: 94
2014 Defender 90 Puma 2.2 XS CSW Corris Grey
thanks guys, just what I needed.
Post #593642 16th Jan 2017 9:55pm
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VeeTee



Member Since: 06 Mar 2011
Location: Somewhere
Posts: 1512
Netherlands 
custom90steve wrote:
VeeTee - This is what I was looking up last night.
One reason I'm also going to change my spot light Relay over to a type with in-line diode built in.
I don't like the idea of fitting LED headlights with EMF creating spikes up to nearly 200v is possible.

That is fine fir mini relays but HD types seem to have no diode built in and seem to have a 300mA coil which is larger thus creates even more EMF current to dissipate.

Would this suit fitted parallel in this instance for me and the OP?

http://www.ebay.co.uk/itm/1x-Durite-Diode-...SwQItT6L1P

There is a 10A in-line version too, but typically they are fitted in parallel with the coil not in-line.


I am not sure about this, but I think the current (spikes) generated when the coli is deactivated is logiccally about the same or generally much smaller than needed for activation, thus < 300 mA. It's about volts, not amps with spikes, if the same energy is released within a split second, then with a coil having a small resistance gives spikes with high Voltage low current. I can not explain it in full detail, but here is some more interesting info about the subject. Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold)
1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold)
1975 Series III 88 V6, Light Green (sadly sold)
1996 Defender 110 CSW 300 Tdi, Epsom Green (sold)
2000 Freelander 1 TD4 3-drs, Silver (sold)
2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold)

MySite
Post #593746 17th Jan 2017 8:20am
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