Glow Plug Circuit Code
Fleet Owner
Joined: Apr 2012
Posts: 27,307
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From: Spanaway
Anything from a dirty plug on the GCM to a bad Glow Plug.
First thing to do it pull the plugs off the GCM and clean
then with some contact cleaner and add some dielectric grease.
Next think is going to be checking the #4 Glow Plug from that
same plug with a DMM. The thing about doing it at the GCM plug
is you also are checking the cable down to the plug. I would look at the
cable to see if any thing is covered in oil. If you find a bad plug then you may
want to plan on replacing the harness and the other 3 plugs.
I don't have a copy of the GCM plug that I can post so you may have to look for it
or ask and someone may have it.
Sean
First thing to do it pull the plugs off the GCM and clean
then with some contact cleaner and add some dielectric grease.
Next think is going to be checking the #4 Glow Plug from that
same plug with a DMM. The thing about doing it at the GCM plug
is you also are checking the cable down to the plug. I would look at the
cable to see if any thing is covered in oil. If you find a bad plug then you may
want to plan on replacing the harness and the other 3 plugs.
I don't have a copy of the GCM plug that I can post so you may have to look for it
or ask and someone may have it.
Sean
Fleet Mechanic
Joined: Aug 2012
Posts: 1,760
Likes: 21
Glow plug may be bad. What year, how many miles? What is the code#. You can check them with an ohm meter. Glow plugs read less then 2 ohms. I think #4 cylinder is second one drivers side. Find the wire connection, ohm glow plug to gnd.(neg batt post).
Chuck
Chuck
Thread Starter
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Junior User
Joined: Nov 2008
Posts: 95
Likes: 0
It's a 2005 with 118k on the clock. I don't remember the exact code number, but it just said "cylinder 4 glow plug circuit". This is gonna sound dumb, but where are the glow plugs located on this engine? Is it something I can change myself, or is it pretty in depth?
Fleet Mechanic
Joined: Aug 2012
Posts: 1,760
Likes: 21
I got the tool and still chewed the plastic caps all up.
Tool: Amazon.com: OTC 6768 Ford 6.0L Glow Plug Install/Removal Tool: Automotive
Chuck
Fleet Mechanic
Joined: Aug 2012
Posts: 1,760
Likes: 21
I got the tool and still chewed the plastic caps all up.
Tool: Amazon.com: OTC 6768 Ford 6.0L Glow Plug Install/Removal Tool: Automotive
Chuck
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Fleet Mechanic
Joined: Aug 2012
Posts: 1,760
Likes: 21
I got the tool and still chewed the plastic caps all up.
Tool:Amazon.com: OTC 6768 Ford 6.0L Glow Plug Install/Removal Tool: Automotive
Chuck
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