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Old 05-20-2012, 09:39 PM   #1 (permalink)
57diesel
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Black vs Grey PMD connector

This has come up before in other threads but not clearly been answered that I can find. So here is the answer in its own thread so it will be easy to search.

Both styles have the same number of pins, same pin out, and same basic connector size. The difference is the original pump harness that came with the black ones has a couple of little ears at the ends of the connector block.

The black connector has ears and will not plug into a grey pmd. It may be possible to grind the ears off so it will fit a grey PMD.

The grey connector just has square ends and will plug into a black PMD.
It appears that the many of the extension cables are built with the grey style connectors because they will fit either style.

It also appears as though many of the resistors have the ears and the ears have to be cut off to fit the grey pmd's.
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Last edited by 57diesel; 05-20-2012 at 09:40 PM.
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Old 05-20-2012, 10:18 PM   #2 (permalink)
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yes, cut the ears and you're done
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Old 05-21-2012, 07:55 AM   #3 (permalink)
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Thanks for posting that.
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Old 05-21-2012, 11:10 AM   #4 (permalink)
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http://www.kennedydiesel.com/docs/FS...nterchange.pdf
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Old 11-26-2012, 09:21 AM   #5 (permalink)
Darrin Sherrill
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So if i'm understanding correctly the only major difference is the connector. My truck has a newer grey PMD installed and it has gone bad, I am replacing with a black PMD which is cheaper and available locally. Trimming the plug will not hurt anything? I also have a relocation cable ordered so I should eliminate the heat problems...
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Old 11-26-2012, 09:30 AM   #6 (permalink)
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You should have no problems with that install-the only trimming needed will be on the extension harness where it plugs into the IP harness-be sure to get a heatsink and resistor with the PMD.

Very few grey PMD's have been reported as failures-how have you determined it to be at fault?
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Old 11-26-2012, 09:45 AM   #7 (permalink)
Darrin Sherrill
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IP was replaced 3 years ago due to stalling issues and not restarting till cool. Problem came back in a year and was determined by the dealer service dept that the PMD was bad and it was replaced under warrenty, now the warrenty is out and the same problems have came back. I have read many forums leading in the same direction. Many have said this is a GM problem with this perticular IP PMD due to overheating.
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Old 11-26-2012, 11:50 AM   #8 (permalink)
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Quote:
Originally Posted by Darrin Sherrill View Post
IP was replaced 3 years ago due to stalling issues and not restarting till cool. Problem came back in a year and was determined by the dealer service dept that the PMD was bad and it was replaced under warrenty, now the warrenty is out and the same problems have came back. I have read many forums leading in the same direction. Many have said this is a GM problem with this perticular IP PMD due to overheating.
We know that fact. We also suggested that plus we also suggest that you put the PMD on a heatsink and mounted the assembly somewhere OUTSIDE THE HOOD.

As far as Racer55 question, I guess he is asking how you determine the faulty PMD? and we just would like to learn from your experience. Where the PMD was located, etc. Have you tried a good KNOWN WORKING PMD, etc?
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Old 11-26-2012, 12:15 PM   #9 (permalink)
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Quote:
Originally Posted by JMJNet View Post
We know that fact. We also suggested that plus we also suggest that you put the PMD on a heatsink and mounted the assembly somewhere OUTSIDE THE HOOD.

As far as Racer55 question, I guess he is asking how you determine the faulty PMD? and we just would like to learn from your experience. Where the PMD was located, etc. Have you tried a good KNOWN WORKING PMD, etc?
Bingo!
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Old 11-26-2012, 12:17 PM   #10 (permalink)
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Quote:
Originally Posted by Darrin Sherrill View Post
IP was replaced 3 years ago due to stalling issues and not restarting till cool. Problem came back in a year and was determined by the dealer service dept that the PMD was bad and it was replaced under warrenty, now the warrenty is out and the same problems have came back. I have read many forums leading in the same direction. Many have said this is a GM problem with this perticular IP PMD due to overheating.
3 years from a IP mounted PMD is about what can be expected,some get more-some get less.
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