Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Tractor Talk Discussion Forum

85 Ford 6.9 Diesel glow plugs

Welcome Guest, Log in or Register
Author 
rrlund

08-20-2007 11:30:40




Report to Moderator

Question about an 85 Ford 6.9 diesel. Is there a temp sensor or something somewhere that tells the glow plug control box on the fender well when to turn on and off? If so,where is it? I've changed that box and it still won't stay on long enough to start the truck in cold weather and won't ever stop coming on. It can be 90 degrees and it will come on about every 60 seconds and stay on for a second or two,all day long.

[Log in to Reply]   [No Email]
jdemaris

08-20-2007 15:10:47




Report to Moderator
 Re: 85 Ford 6.9 Diesel glow plugs in reply to rrlund, 08-20-2007 11:30:40  
Early 6.9s like your's are different that the later ones - e.g. 1987 6.9s. Your system has an "after glow" relay as well as a controller and temp sensor. Also the OEM glow plugs are not PTC type like later ones. The PTC (positive temperature coefficient)plugs protects themselves from burning out.
As the other guy posted - don't use Autolite - and also - don't use Champion or old-stock Delcos. If you buy Bosch, Beru, or Wellman - you'll be fine. If you buy over-the-counter from Ford - inside the Motorcraft box - will be a German Beru plug. I've heard the early Ford diesels had problems with the glow-plug system. My 85 has worked flawlessly for years - so I can't complain. It's worked much better than the glow plug systems on any of my older GM 6.2s.

[Log in to Reply]  [No Email]
crackerhead

08-20-2007 13:55:29




Report to Moderator
 Re: 85 Ford 6.9 Diesel glow plugs in reply to rrlund, 08-20-2007 11:30:40  
directly behind the air filter is the controller for the glowplugs . It screws into the block and will have a couple of wires attached to it . It works of the water temp.. notorious for going bad . Simple solution is to add a pushbutton switch inside the cab .Run a wire that is hot all the time to one side of the switch and another wire from the other side of the switchto the glowplug relay located on the fenderwwell. Hook this wire to the small terminal on the relay that is closest to the engine .When you are ready to start the engine ,hold the pushbutton in for about 10 seconds which in turn will close the relay energizing the glowplugs. There should be 12 volts at the top of the glowplugs with this switch closed.[may need help as one person closes switch ,other checks voltage] If no voltage at glowplugs check the inline fuses[should be 2] on the wiring harness next to the relay,or check the glowplug wiring harness for a broken wire in the harness itself[ask me how I know like to have drove me batty]Also be sure all glow plugs are good and not burned out. If any are bad take a fools advice and DONOT replace rhem with the autolite Glowplugs,Go back with the Bosch plugs as the Autolite glowplugs will swell at their tips ,and then they are a pain in the rear to remove ,but that is another story.

[Log in to Reply]  [No Email]
rrlund

08-20-2007 16:11:23




Report to Moderator
 Re: 85 Ford 6.9 Diesel glow plugs in reply to crackerhead, 08-20-2007 13:55:29  
I'll look for that sensor tomorrow. I knew it had to have one. I tried hooking to a switch,don't know if I hooked to the right terminal on the controller or not. The light would come on on the dash and go off,just like it did off the engine sensor,all I was doing was activating it manually somehow. I check the plugs every fall,usually have two or three burned out from being on so much. So,thanks for the help,I'll se if I can fix it in the morning.

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy