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VMS PC Complete Engine Monitoring 12 pin ALDL connection
Rectangular 12 Pin ALDL
Silverleaf VMS PC Complete Engine Monitoring 12 pin ALDL connection
  
Price: $342.95
MFG: Silverleaf

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Description
 
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.

Silverleaf VMS PC Complete Engine Monitoring 12 pin ALDL connection