J1708/J1587 and J1939 Diagnostic Plugs

The "standard" Diagnostic Plugs are a Round Deutsch plug with 6 or 9 Pin Postions and for historic reasosn the Rectangular 12 Pin ALDL plug that is used by the Allison Transmission. There are Diagnostic Connectors in the Engine Compartment and "upfront" near the Steering Column. The Round Deutsch plugs were chosen at the time the Electronic Engine Standard was developed, so you will always have one of these 3 Plugs when you have an Electronic Diesel Engine.

Not all of the Positions will have Terminals (the Metal Contacts). Typically, the 6 Pin Plugs have 4 Terminals, the 9 Pin Plugs have 4 Terminals and with later coaches they have 7 Terminals. The Rectangular 12 Pin ALDL will have 4 to 8 Terminals.

Different Chassis manufactures installed (Implemented) the Deutsch Plug at different times near the Steering Column. For example Safari implemented the Deutsch 6 Pin in 1996 (it was the Wrong 6 Pin, but they tried), On The Other Hand, Country Coach did not implement the Deutsch 6 Pin until 2000, relying on the ALDL plug for the Transmission and Engine Technicians to plug diagnostic equipment into.

We have available for the VMSpc and VMS, both types of Deutsch Plugs, AND NOW the ALDL Plugs as well. We can also provide a "wiring diagram" to connect a Pig-Tail harness to your coach for the VMSpc and VMS.



SilverLeaf Electronics J1708/J1587, J1939, RV-C Wiring Diagrams



========================== OLD INFORMATION ==========================
We have available for the VMSpc and VMS, both types of Deutsch Plugs, but the ALDL Plugs are "very obsolete", and the best we can do is provide a "wiring diagram" to connect a Pig-Tail harness to your coach for the VMSpc and VMS.
========================== OLD INFORMATION ==========================

Mark Overholser

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Mark D. Overholser
Engineering Technician
SilverLeaf Electronics Inc.
2490 Ferry Street SW
Albany, OR 97322

888-741-0259
541-967-8111
541-967-8988 (fax)