Wiring Question - 12v Fuel Pump - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old February 9th, 2016, 09:15 PM
LostChord's Avatar
LostChord
Status: Offline
Brian
86 D110 SW
Member
 
Join Date: Nov 2014
Location: Florida
Posts: 1,313
Registry
Wiring Question - 12v Fuel Pump

I am looking to install a sedimenter (from Robert Davis) and 12V fuel pump (Mr Gasket 12D Electric Diesel Fuel Pump from eBay) with my dad, who bloodied his knuckles as a diesel mechanic for the US Marines in Vietnam. In other words, he is the brains and at this point, I’m just the brawn. We’'re stuck on the wiring and could use some help. We have a 1986 ROW 110, with a 200Tdi.

We realize that the pump wiring from a 12V relay is:

86 : ignition circuit - white (+) when key is on
85 : ground (-)
30 : Positive (+) from battery (usually taken off main starter lead)
87 : (+) when key is on

Sadly, I don’'t yet know enough to show my dad where these wires actually are (or are coming from), or where to put the 12v relay, etc. As expected, he doesn’'t want to monkey up the truck, and while he knows diesels, he doesn’'t know rovers. I have searched, but cannot seem to find anything –that makes sense. Mostly, this is because though I'm comfortable with the mechanics of these trucks (with dad's help), the electrical side of the equation has always been my nemesis. Wiring diagrams are like hieroglyphics to me - my eyes glaze over and I don't know what I'm looking at (though I am trying to edumacate myself as much as possible).

Basically, we’re staring at the wires from the 12v pump in one hand, a 12v relay in the other, and the truck in my driveway, and can’t get it figured out just yet. So, what is the best way/place to get a positive wire and an ignition wire, and the best way to add a fuse to that line?

Lastly, any tips on the which fuel line, clamps or other nozzles to use would be most helpful.


Thanks - brian
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old February 10th, 2016, 09:15 AM
LostChord's Avatar
LostChord
Status: Offline
Brian
86 D110 SW
Member
 
Join Date: Nov 2014
Location: Florida
Posts: 1,313
Registry
Up for help from the morning crowd
Reply With Quote
  #3  
Old February 10th, 2016, 09:30 AM
Elbee's Avatar
Elbee
Status: Offline
Lance
1989 110 200tdi
Member
 
Join Date: Jul 2014
Location: CVille, VA soon Seattle, WA
Posts: 393
Registry
I'm interested in this also. I have one laying around from Davis as well, never got around to digging into it and figuring it out on my own
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old February 10th, 2016, 09:58 AM
BlackField's Avatar
BlackField
Status: Offline
Oscar
D110
Member
 
Join Date: Mar 2012
Location: NYC
Posts: 1,641
Well, once you get behind the dash you should easily be able to see the cluster of white wires (literally 4-5 white wires joined together). Failing that you can go to the ignition switch and follow the white lead from there.

As far as your + for your 30 pin it can be as simple as wiring it from the battery with an inline fuse. Other locations for Live + are the brown wire at starter, ignition switch or light switch.
__________________
Lemmings as you know them are a Disney fabricated lie. The truth is out there.
Reply With Quote
  #5  
Old February 10th, 2016, 10:25 AM
Daddymow's Avatar
Daddymow
Status: Offline
Raub A.
1987 D110 Tithonus
Member
 
Join Date: Oct 2011
Location: Stuart, FL / Boone, NC
Posts: 3,974
Registry
I haven't got around to installing mine yet either. Just another ignorant unfortunately.
__________________
You can't polish a turd but you can roll it in glitter - eBay.uk ad for Freelander.
Reply With Quote
  #6  
Old February 10th, 2016, 10:29 AM
o2batsea's Avatar
o2batsea
Status: Online
Bill Adams
66 109 sw 94 lwb
Member
 
Join Date: Jul 2009
Location: kensington md
Posts: 6,506
Registry
Send me a PM and I will try to walk you thru this. It's not difficult. If you need me to I can make you the wires.
__________________
Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
Reply With Quote
  #7  
Old February 10th, 2016, 10:47 AM
LRover's Avatar
LRover
Status: Offline
J. Michael McCaig
D90 ST, LR110, Series IIa, RRC
Member
 
Join Date: Oct 2003
Location: VA
Posts: 479
This is how I did it: Fuel pump black wire goes to ground, red wire goes to relay terminal 87. Relay terminal 85 goes to ground and 86 can be any fused power source that comes on with the key. I took mine off of the fuse block. I mounted the relay on the bulkhead in the engine compartment and power to terminal 30 came off of the main power lead from the starter with an inline fuse near the source. I hope this helps.
Reply With Quote
  #8  
Old February 10th, 2016, 10:55 AM
Red90's Avatar
Red90
Status: Online
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,250
Registry
If you are not planning a whole raft of aftermarket wiring installs....then I would use a waterproof relay and mount it in the battery box with a simple waterproof inline fuse holder. the rest is pretty straightforward.

OTRATTW :: Accessories :: Relays
OTRATTW :: Accessories :: Fuse Holders and Fuses :: Bussmann MINI Fuseholder-HHL
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #9  
Old February 10th, 2016, 11:07 AM
Greenbull's Avatar
Greenbull
Status: Offline
Mark Miller
1994 Defender 90NAS #1258
Member
 
Join Date: Jan 2013
Location: Charlotte,NC
Posts: 1,044
Registry
Also you don't need the 12v pump, to mount the sedimenter Robert sells. I have two, one on my 95 classic 300 tdi, and one on my 94 NAS defender 300 tdi. Neither uses a fuel pump.
Reply With Quote
  #10  
Old February 10th, 2016, 11:46 AM
LostChord's Avatar
LostChord
Status: Offline
Brian
86 D110 SW
Member
 
Join Date: Nov 2014
Location: Florida
Posts: 1,313
Registry
Quote:
Originally Posted by Daddymow View Post
I haven't got around to installing mine yet either. Just another ignorant unfortunately.
Raub - put this on your schedule for your next trip up. We can do them both at the same time

------ Follow up post added February 10th, 2016 11:47 AM ------

Quote:
Originally Posted by o2batsea View Post
Send me a PM and I will try to walk you thru this. It's not difficult. If you need me to I can make you the wires.
Bill - many, many thanks. PM inbound.

------ Follow up post added February 10th, 2016 11:50 AM ------

----------
Oscar, Michael, John, Mark - thank you for the replies. Very helpful and the process is getting clearer.

Said before, and will say again - this community is cool.
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
fuel pump wiring bypass ember Defender Technical Discussions 6 October 18th, 2012 08:21 AM
1997 D-90 fuel pump wiring diagram Tyler Wirken Defender Technical Discussions 3 October 3rd, 2012 01:44 AM
Wiring Fuel Pump to a seperate switch, Good or bad idea? Neil McCauley Defender Technical Discussions 4 September 3rd, 2010 05:20 PM
Fuel pump and fuel gauge relationship question - troubleshoting... arbik Defender Technical Discussions 1 September 19th, 2006 02:31 PM
Fuel Pump, Switch, Relay, or Wiring? bbandit Defender Technical Discussions 19 July 10th, 2005 12:08 PM


All times are GMT -5. The time now is 11:59 AM.


Copyright