PCM Connector?
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Freshman User
Joined: Jan 2009
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From: Central Coast, CA
PCM Connector?
Does anyone know how I can locate and test my PCM connector pin#8 on a 1999 7.3? I took off the 10mm bolt from the engine compartment pcm connector but all I see is a long red connection with a ton of unlabled pin holes? Im trying to test Ohms from the GPR ground to this Pin#8. Thanks for any help!
Postmaster
Joined: Oct 2005
Posts: 2,956
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From: Northeast TN
I misunderstood what you where asking. You need to check the under valve cover wiring harness "UVCWH". Here is the pin out for it.
uvc pin out
Pin Out at the valve cover to test them,,
G G I I C I I G G
G=Glow Plug +
I = Injector +
C= Injector Common
***The injectors fire with a 115VDC signal from the IDM do not pierce to wires to test.***
Ohm between "I" and "C" to test the injectors, should be less than 5.0 Ohms
To check glow plugs Ohm between "G" and battery ground should be between 0.1 and 2.0 Ohms
uvc pin out
Pin Out at the valve cover to test them,,
G G I I C I I G G
G=Glow Plug +
I = Injector +
C= Injector Common
***The injectors fire with a 115VDC signal from the IDM do not pierce to wires to test.***
Ohm between "I" and "C" to test the injectors, should be less than 5.0 Ohms
To check glow plugs Ohm between "G" and battery ground should be between 0.1 and 2.0 Ohms
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
I don't have the pin out but maybe this can help. The pcm uses the barometric and EOT sensors to tell the pcm how long to activate the glow plugs. Maybe temperature sensor as well but not sure. If you disconnect the EOT sensor it is suppose to activate the glow plug relay for two minutes. You don't want to start it like this because I have heard from someone that did and they said it ran rough.
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