GPR not grounding??? - Ford Powerstroke Diesel Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 5 Old 09-28-2010, 07:21 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jul 2010
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
GPR not grounding???

Hey all,
I have an 01 F250 49 state rig. I did the Stancor relay and replaced all the glow plugs because it's hard to start at altitude when cool and the truck was neglected by it's previous owner & I figured I would have to do this eventually anyway. Now that this is done, the problem persists. I am getting no power across the relay to the glow plugs. I checked and I am getting battery voltage to the large black/yellow wire side (full time) and the small red wire (KOEO) but it never grounds at the small orange wire. I manually grounded it with a jumper to make sure the relay is good and it is and power crossed to the large terminal on the glow plug side. Any idea where the orange wire goes or how to continue the diagnosis?
fmini is offline  
post #2 of 5 Old 09-28-2010, 06:02 PM
Member
 
Join Date: Jun 2010
Location: Carbondale, CO.
Posts: 62
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Pretty sure the ground is PCM controled by a number of factors such as oil temp and others. Can you start it after you manually groung it?

Dean
02 F-350 CC
DND58 is offline  
post #3 of 5 Old 10-04-2010, 07:32 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jul 2010
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
It starts fine right now but it is not cold here yet. I know it is not grounding becasue the power does not go through the relay. I can manually ground it and it works. I am wondering if the Baro or EOT could be bad or if it is only the PCM? For that matter is the Baro integral to the PCM or elsewhere on the truck?
fmini is offline  
post #4 of 5 Old 12-04-2010, 07:04 PM
Powerstroke.org Rookie
 
Join Date: Feb 2010
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have the same problem. PCM not sending a GROUND signal to the orange wire on the GPR. GPR works when jumping ground to the gounding terminal. Glowplugs work to start the engine if the GPR is jumped/hotwired.

Are there any more trouble shooting aids or do I just start replacing things?
ClearProp is offline  
post #5 of 5 Old 12-11-2010, 07:18 AM
Powerstroke.org Rookie
 
Join Date: Nov 2010
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I just had the same problem. (2002 f350) Replaced the PCM and fixed. Make sure the EOT sensor and air temp sensor are good before looking at the PCM.
frttrain is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome