glow plug help
Thread Starter
|
Cross-Country
Joined: Sep 2010
Posts: 64
Likes: 2
glow plug help
I think i have some bad glow plugs. it is very hard to start in the mornings even if its only 40 degrees or so outside. But, if you plug it in, it starts right up like it supposed to. its a 2003 with a 6.0. The question is , if you unplug the plugs on the GPCM .can you test each individual glow plug on the pins in the connector.On my other truck, which is a 85 f250 with a 6.9l, i can clip a test light on the positive post of the battery and with the probe end touch the top of the glow plug. if the light comes on ,the glow plug is good, if not ,its bad..Can i clip the test light on the positive post on the battery and probe the A B C and D pins in the connector that i took off the GPCM and test the individual glow plugs on my 2003 6.0l
`
`
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
You can test the glow plugs individually. I would not try to use the connectors to the GPCM itself, though. There are other pins there, such as power, communications, etc. There are individual connectors on the left and right buss bars. There are 4 pins each in them. One pin per plug.
However, the GPCM should be monitoring them for you. If a plug is bad, a code should be set. If you can get codes read you should be able to tell if you have any bad plugs.
However, the GPCM should be monitoring them for you. If a plug is bad, a code should be set. If you can get codes read you should be able to tell if you have any bad plugs.
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
As long as you know the pins it shouldn't be a problem. You could simply use a ohmmeter. If you see a short (no resistance at all), or open (infinite resistance) then you'd know you had a bad plug.
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
2003 moniters gpcm operation but no light. that came later on. 06+ i think.
anyway do not use a test light to check glowplugs on your 6.9 or your 6.0. the theory is good but you can be mislead as to weather a glowplug is good or bad.
as said there are buss bar connectors for each bank test there with a dvom should be abour 2 ohms.
IMO you dont have a just a glowplug issue. if you have a glowplug concern at all.
anyway do not use a test light to check glowplugs on your 6.9 or your 6.0. the theory is good but you can be mislead as to weather a glowplug is good or bad.
as said there are buss bar connectors for each bank test there with a dvom should be abour 2 ohms.
IMO you dont have a just a glowplug issue. if you have a glowplug concern at all.
Trending Topics
Thread Starter
|
Cross-Country
Joined: Sep 2010
Posts: 64
Likes: 2
Yep, i tested those glow plugs this morning and found 2 bad ones on the passenger side bank of cylinders. This truck is hard to work on compared to my 85 6.9l, but when it comes to pulling power, there,s no comparison . thanks to all you that helped me diagnose this problem.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
Roody727
Excursion - King of SUVs
4
Jan 25, 2013 06:43 PM
