Fuel pump and pcm
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Joined: Jan 2019
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From: Austinburg oh
Fuel pump and pcm
Hi guys can somebody help?I have 99 7.3 I was checking for power in my PCM plug the power of the PC which pens are they I don't know how to read the plug they say it's 73 and 90 something I think and one more thing I think my PCM is bad I'm not sure if I'm going testing with a test light depends and I hit the fuel pump and my fuel pump won't turn on but when I have it unplug key on when I touch the fuel pump pin I suppose it is it turns my fuel pump on now I got to bed relay glow plug relay could that be the purpose is not kicking on because of that bed relay or is it my PCM you think thank you folks
Lead Driver
Joined: Dec 2006
Posts: 7,092
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From: San Diego, CA
I don't know exactly how the PCM pins out but you can look up wiring diagrams for your truck here for free: Search Wiring Diagrams
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Hesson81
1999 - 2003 7.3L Power Stroke Diesel
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Oct 8, 2018 06:49 PM
