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glowplug module testing?

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Old Sep 20, 2015 | 12:04 PM
  #1  
Mr. Finch's Avatar
Mr. Finch
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glowplug module testing?

OK, I have an 01 f350 cali truck with the Glow plug Module in place of a relay. I have been noticing white smoke on start up even though we have just had cool mornings (northern illinois), I ran my scanner on it and did the glow plug test and it is coming up with circuit codes for 2,4,6,8. Since the codes are all on 1 bank, I am thinking the issue is in the module, from my understanding it is the equivalent of 2 relays.

So what is the best way to test the module? Can 1 shorted out glow plug make the whole bank seam dead (drawing all power away from others)?
 
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Old Sep 20, 2015 | 12:21 PM
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Thomas White's Avatar
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Originally Posted by Mr. Finch
OK, I have an 01 f350 cali truck with the Glow plug Module in place of a relay. I have been noticing white smoke on start up even though we have just had cool mornings (northern illinois), I ran my scanner on it and did the glow plug test and it is coming up with circuit codes for 2,4,6,8. Since the codes are all on 1 bank, I am thinking the issue is in the module, from my understanding it is the equivalent of 2 relays.

So what is the best way to test the module? Can 1 shorted out glow plug make the whole bank seam dead (drawing all power away from others)?
The Automated OBD-II Glow Plug Test Command turns the GP's on for 30 Sec. and reports back. So, the DS is not activating.

You will need to perform a continuity (OHM) test on the DS GP Bank from the Module to the GP. But, first,

Also, a TSB for the Wiring End Connectors at the GPM indicates loose, broken contacts, and corrosion being a probability (an update is available). Clean them with contact cleaner [not brake fluid, carburetor cleaner, or degreaser] and see if this helps. My experience has been this corrects the issue 80% of the time.
 
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Old Sep 20, 2015 | 02:02 PM
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cool, I knew about the issues with the valve cover connectors, but that should cause injector issues also, I did not know there was an issue with the GPM connectors. I was going to start resistance tests on the plugs but first will check the gpm for rotted connectors. thanks.
 
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Old Sep 20, 2015 | 02:10 PM
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Maybe you may also beable to help me with another issue?

Ever since I bought this truck I get a code P0605 "internal rom error", but I dont get a check engine light for it. I only see the code when performing KOEO test, wich is the one that also pulls codes from the IDM, could this could be reffering to the IDM or the PCM?
I started thinking that this might be related to the IDM when I replaced the injectors with remans from riff raff, after installing them I get a CEL and codes in the pcm for "IDM codes". when pulling codes from the Idm I get the P0605 along with circuit codes for injectors # 2,3,5,6 but the resistances across the solenoids is the same for all 8 injectors. Any thoughts?
 
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