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Diagnostic Plug on a 1998 M1078

M1224

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I'm trying to figure out why I have a 6 pin round J1708 diagnostic plug in the place of the old Allison diagnostic port on my 1998 S&S 1078 with a BAE data plate on it. BAE did a RESET in 2010 where they did a full repaint (among other things apparently). I didn't think A0 trucks had a network, let alone a 6 pin J1708.

Don't mind the Master Light Switch. I replaced the faulty pushbutton light switch that came with it with a spare 3 lever I had in stock.


7 pin plug.jpg
 
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M1224

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The Allison and the CTIS both have J1939/J1708 busses even if the engine does not. Hook it up to a scan tool and see what you find.
Already checked the CTIS harness. Pins D, a, N, and A are all empty. D & a are for 1708 and N & A are for 1939. But I bet it's for the Allison alone.

I'm the TACOM Equipment Specialist for FMTV's and this is the first J1708 I've seen in an A0.
 

Ronmar

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That 6 pin round deutsch plug is an Allison comms option for WTEC 2 and 3, besides the GM dual inline connector the earlier A0 trucks came with… I have both the GM and a round adapter for my pro-link. Also have a FL-50 ambulance at work with a WTEC2/cummins and the 6 pin round plug…
 
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GeneralDisorder

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Nice. I was thinking of the NSN for the cable assembly - since the A0 was a paper manual truck and doesn't exist in electronic TM's that I've run across.
 

Ronmar

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It appears to be in the 24P manual(they both are deutsch and GM connectors)…
In the end they use the same 4 pins. +DC, Ground and two serial lines

IMG_3946.png
 

M1224

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Nice. I was thinking of the NSN for the cable assembly - since the A0 was a paper manual truck and doesn't exist in electronic TM's that I've run across.
When you say "Electronic", I'm guessing you mean EMS NG or IADS? Cause I have the complete set downloaded in PDF.

I do have the A1, A1R book and the A1P2 in EMS NG. I also have the draft A2 in IADS.
 

GeneralDisorder

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When you say "Electronic", I'm guessing you mean EMS NG or IADS? Cause I have the complete set downloaded in PDF.

I do have the A1, A1R book and the A1P2 in EMS NG. I also have the draft A2 in IADS.
Right. I mean EMS-NG. And yeah the A0 manuals are scanned into PDF - they are here on this forum for download actually. They were *originally* paper manuals back in the 90's. PDF is really just an e-book reader with some searching ability in this case. EMS-NG doesn't have any A0 stuff that I've seen. Only the newer A1, A1R, and A1P2 for FMTV's.

Ron - that's an interesting plug, From the picture that doesn't appear to be the standard J1939 plug found in the A1+ trucks. As you say it must be an Allison specific diagnostic plug.
 
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M1224

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Croswell, MI
Ron - that's an interesting plug, From the picture that doesn't appear to be the standard J1939 plug found in the A1+ trucks. As you say it must be an Allison specific diagnostic plug.
Back in the day, J1708 standard plugs were 6 pin. The J1939 brought the 9 pin connector. Now you can do J1708 on a 9 pin no problem.

I'm going to "Borrow" an MSD V2 and a DPA 4 from work with the Allison software on it and hook it up. See what it can do.
 

Ronmar

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Right. I mean EMS-NG. And yeah the A0 manuals are scanned into PDF - they are here on this forum for download actually. They were *originally* paper manuals back in the 90's. PDF is really just an e-book reader with some searching ability in this case. EMS-NG doesn't have any A0 stuff that I've seen. Only the newer A1, A1R, and A1P2 for FMTV's.

Ron - that's an interesting plug, From the picture that doesn't appear to be the standard J1939 plug found in the A1+ trucks. As you say it must be an Allison specific diagnostic plug.
I think the drawing is a little off, which is not out of the ordinary for that manual, but I am pretty sure that is the same 6 pin Deutsch test plug that we are familiar with.

The 24P identifies it as J117.
48 PAOZZ 19207 12421844 .CONNECTOR,RECEPTACL (J117)........ 1

and a search of that 24P P/N on the NSN supplier websites lists Deutsch, Engineered Connecting as one of the “manufacturers”(suppliers) with a manufacturers P/N HD10-6-12P.

here is a pic from Mouser…

IMG_3948.png
 

M1224

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Steel Soldiers Supporter
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Location
Croswell, MI
I think the drawing is a little off, which is not out of the ordinary for that manual, but I am pretty sure that is the same 6 pin Deutsch test plug that we are familiar with.

The 24P identifies it as J117.
48 PAOZZ 19207 12421844 .CONNECTOR,RECEPTACL (J117)........ 1

and a search of that 24P P/N on the NSN supplier websites lists Deutsch, Engineered Connecting as one of the “manufacturers”(suppliers) with a manufacturers P/N HD10-6-12P.

here is a pic from Mouser…

View attachment 929523
Yep, that's the one.
 
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