54 Pin Plug wire diagram needed

[tager705]

Hi everyone,

I am in the process of fixing shorts, random hacked wires etc. I had basically ignored this cap until i bumped it and the cover popped off to revealed I think a 54 pin plug. I asked all my friends that used to drive the HMMWV and got the following suggestions which don't seem to make sense.

option 1:Slave port.
Option 2: radio plug
Option 3: diagnostic computer plug.

I'm inclined to believe its option 2 but from my research most of the radios run on a 9 Pin connector, also a vote against this option is on the passenger side I have a large black cable that's been chopped off (De-milled). Clearly its not a slave port two pins vs 54 pin. Option three is kind of out because I don't think their is an ECU on the HMMWV so how would it have a diagnostic plug.

Here is a photo of the plug, mostly just curiosity as to its purpose and if any one has a wiring diagram. Thanks

 

[NDT]

The crude "STE-ICE" (simplified test equipment internal combustion engine) plugs in there. Totally analog inputs to the device such as fuel pressure, cranking amps etc. It does not need to be connected.

 

[Stonepicker1]

Item #6

 

[tager705]

Sweet thanks.
I had only seen the OBD style diagnostic tool plugs. Sounds like I get to go buy a new tool.

 

[snowtrac nome]

have fun finding one in all my years in the motor pool I used it once for training. the plug can be handy as plug s and t goes straight to the starter solenoid and if you have a control box failure with a paper clip you can start the truck from that plug