Go Back   Ford Truck Enthusiasts Forums > Diesel > Bio-diesel, Propane & Alternative Diesel Engine Fuels
Sign in using an external account
Register Forgot Password?


Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 04-11-2013, 02:16 PM
Stuart Dickinson Stuart Dickinson is offline
New User
 
Join Date: Feb 2013
Posts: 8
Stuart Dickinson is starting off with a positive reputation.
Need a Live Wire - Auxiliary Fuel Pump Wiring

Hi Everyone,

Working on my 1992 F350 (single rear wheel) long-box crew cab. Just drove it from Florida to British Columbia pulling a 7000lb trailer. What an adventure but even at 200,000 miles, the beast just soaked it up!

I have a used vegetable oil conversion system + 1600 litres of veggie oil and I'm putting it on my truck. The 'parts' truck I pulled it off was running nicely so I know it works. Nothing fancy, has a copper coil + insulation under the front tank, running off a coolant loop. There is an in-line coolant/fuel line heat exchanger and an additional fuel filter, again, wrapped in hose running off the same coolant loop.

The tank selector switch is relocated to the engine bay, so the purge cycle should be pretty short, and it also has an auxiliary fuel pump just after the selector switch, which is wired to a toggle switch in the cabin. This is set up to activate a 12v relay which draws fused current from the battery.

I'm a reasonable home mechanic, and okay at electrics but I'm not as confident with that side of things.

I'm trying to figure out how to wire up the switch in the cabin to activate the relay and feed the auxiliary fuel pump. I removed the relay with all the other wiring intact, but the in-cabin was a bit of a mess because someone had added stereo etc.

I know that the 'middle' post on the relay runs to the switch, I'm assuming that I then need to wire the other side of the switch to a part of the wiring loom that has live feed when the key is on. Presumably then flicking the switch will close the relay and then feed the pump?

The only thing I can't figure is, there is also a feed from the RHS of the relay in the photo below, that runs into the wiring loom.

Click the image to open in full size.
Reply With Quote
  #2 (permalink)  
Old 04-14-2013, 08:34 PM
speedwrench72's Avatar
speedwrench72 speedwrench72 is offline
Elder User
 
Join Date: Dec 2012
Location: western washington
Posts: 592
speedwrench72 is starting off with a positive reputation.
the small wire is the relay trip wire,as you know,, the one on the left should run to the load (pump) the other on the right should run to a fused power source to supply the power for the pump when the relay is energized..if this relay is for a electric pump, this relay is possibly over sized...will still work... a smaller cube relay would allso work..the extra wire is probaly the PO geting power for some other device, and he is geting it from this point..
__________________
Wanted 93 crew cab f350 idi... Democracy is two wolves and a lamb voteing on what to have for lunch, Liberty is a well-Armed lamb contesting the vote. Benjamin Franklin... My Boy is a MARINE.... 72 F250 390 HI BOY 4speed.... 91 E350 7.3 idi..KF7POL
Reply With Quote
Old 04-14-2013, 08:34 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Diesel > Bio-diesel, Propane & Alternative Diesel Engine Fuels

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 04:39 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.5.2 ©2010, Crawlability, Inc.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup