GPR Help
Thread Starter
|
Freshman User
Joined: May 2012
Posts: 40
Likes: 0
From: Tacoma
GPR Help
So I just replaced my GPR after my old one tested bad and now I'm not getting power to the glow plugs at all! The big post that is connected to the battery is getting 12v key off the small post towards the front is getting 12v key off and the ground is getting 12v key off and the other big post towards the driver side 0v. With key on same story. I don't know why the gpr is grounding when its supposed to be sending power to the glow plugs. Its not faulty cause I replaced it twice with one from O'Reillys. I recently replaced a fuse for the PCM because it blew due the fuel bowl heater but I wonder if the PCM has something to do with it. Any help is appreciated. I'm not really knowledgeable about electrics so elementary words for me please.
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
You mit of connected the little wires wrong. One from the PCM grounds and the other large post gets power. Another reason we miss RObin, RIP brother, he has all the information and pictures.
Chet
Chet
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Thread Starter
|
Freshman User
Joined: May 2012
Posts: 40
Likes: 0
From: Tacoma
Late reply but everything is hooked up fine. Still not getting proper voltage to the other post. I saw other post about a manual GPR setup anyone have good info on that? I think it is a PCM issue because because the GPR is grounding when it should be sending voltage to the glow plugs.
Trending Topics
More Turbo
Joined: Mar 2009
Posts: 506
Likes: 5
From: South Florida
Late reply but everything is hooked up fine. Still not getting proper voltage to the other post. I saw other post about a manual GPR setup anyone have good info on that? I think it is a PCM issue because because the GPR is grounding when it should be sending voltage to the glow plugs.
If I can help, let me know
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Cargo Master
Joined: May 2010
Posts: 3,047
Likes: 10
From: Snohomish, WA
Late reply but everything is hooked up fine. Still not getting proper voltage to the other post. I saw other post about a manual GPR setup anyone have good info on that? I think it is a PCM issue because because the GPR is grounding when it should be sending voltage to the glow plugs.
It sounds like it may not be getting the ground from the PCM, but it may not be faulty just yet. You can perform a continuity check of that wire by disconnecting from the GPR and disconnecting the PCM connector and measuring pin 101.
Look at this schematic I drew up to make it easier to understand.
Thread Starter
|
Freshman User
Joined: May 2012
Posts: 40
Likes: 0
From: Tacoma
Today I got some test leads and put the alligator clip on the PCM ground post and grounded it to the the battery and that activated the GPR post to send power to the glow plugs. But they would not shut off. The glow plugs where getting a constant 12v after start and the PCM ground post was at 0v. The PCM ground wire was at 12v with key on and was removed from the GPR is that the ground signal the PCM is sending to the GPR? Also is grounding it to the battery ground a good idea? If not where is good location because I hate messing with electricity. So I take it I have to do a manual GPR setup?
More Turbo
Joined: Mar 2009
Posts: 506
Likes: 5
From: South Florida
Today I got some test leads and put the alligator clip on the PCM ground post and grounded it to the the battery and that activated the GPR post to send power to the glow plugs. But they would not shut off. The glow plugs where getting a constant 12v after start and the PCM ground post was at 0v. The PCM ground wire was at 12v with key on and was removed from the GPR is that the ground signal the PCM is sending to the GPR? Also is grounding it to the battery ground a good idea? If not where is good location because I hate messing with electricity. So I take it I have to do a manual GPR setup?
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
That's the best way.
If half of America weren't complete idiots, Ford would have designed the GPR with manual control, anyway. Remember a choke **** on the dashboard? If I had a vehicle with a carburetor, I would have that cable-controlled, by me!
But alas, today we want everything "automatic", and it causes more trouble than it's worth.
Do the manual thing. You'll have much better control, anyway.
Just remember, MOMENTARY switch ONLY!
Pop
If half of America weren't complete idiots, Ford would have designed the GPR with manual control, anyway. Remember a choke **** on the dashboard? If I had a vehicle with a carburetor, I would have that cable-controlled, by me!
But alas, today we want everything "automatic", and it causes more trouble than it's worth.
Do the manual thing. You'll have much better control, anyway.
Just remember, MOMENTARY switch ONLY!
Pop
Thread
Thread Starter
Forum
Replies
Last Post
Larry Wall
1994.5 - 1997 7.3L Power Stroke Diesel
10
Jan 14, 2015 10:32 AM