Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13871
Help with split charge system
I have a second hand split charge from a D3 that I need to fit to my D4. I'm confused with where port 86 connects to.
New Defender L663 110 SE (known as Noddy!)
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
If your relay ground is on 85 then battery to operate the relay must be on 86, thus closing the contacts to enable your auxiliary battery to charge. Usually this is switched battery, only on when the engine is running, releasing when engine is off. Just google auxiliary battery charging and I'm sure you'll get enough information for a safe, reliable installation. If you don't understand what you are reading, have a friend who has some electronics/DC electricity experience/training to assist you, it should not be very difficult.1967 Ford Bronco 289 V8 (1968)
1974 Toyota FJ55 3.9L I6 (1975)
1984 Chev K5 Blazer Camper 400 V8 (1989)
2006 Nissan X-Trail Bonaventure 2.5L I4 (2007)
2007 Land Rover LR3 4.0L V6 (2019)
2nd Aug 2019 3:05 pm
Moo D3 Decade
Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13871
Thanks. 85 is earth but not sure where to connect 86 to on a D4. Any pics etc appreciated.New Defender L663 110 SE (known as Noddy!)
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
2nd Aug 2019 3:23 pm
James W
Member Since: 27 Mar 2008
Location: Wirral, UK
Posts: 3067
I would have thought any ignition-switched live would do. I'll try and see where I connected mine to.
Edit: is that a voltage sensing relay? If not, it will connect your batteries with ignition on, regardless of the state on the starter batteryD4 XS, gone, much loved, never forgotten
2018 FFRR SDV8 Autobiography - Gone to someone with less sense and more time to enjoy it
2016 Toyota Hilux Invincible - Liberating experience
Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13871
Thanks. I'll just eat it then.New Defender L663 110 SE (known as Noddy!)
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
2nd Aug 2019 3:46 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18444
That is not a voltage sensing relay, it's just a standard relay, 100A rated.
You are missing either an "engine running" trigger signal, or a voltage sensing relay to create that trigger for this big relay.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18444
A label on the outside to that effect wouldn't be a bad idea
To be fair, "help" with a photo of a relay case doesn't show that.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
2nd Aug 2019 3:54 pm
James W
Member Since: 27 Mar 2008
Location: Wirral, UK
Posts: 3067
Okay I checked mine and reminded myself that mine is different as the solenoid is switched to earth instead by the T Max controller (which acts as the VSR in this case), rather than taking an ignition switched live to activate it.
Have you got another bit to your 2nd hand kit somewhere?
EDIT : I'll bow out, this is getting confusing D4 XS, gone, much loved, never forgotten
2018 FFRR SDV8 Autobiography - Gone to someone with less sense and more time to enjoy it
2016 Toyota Hilux Invincible - Liberating experience
2nd Aug 2019 3:58 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13598
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
Thanks. I'll just eat it then.
