Alright, I bought the vaccuum tester, now where do I start?

None of the doors lock centrally and the trunk is always locked unless I turn the key. My brakes seem to work fine, my transmission seems to be doing well (sometimes I have to let up a little to shift, but usually fine), and there is only a little "dieseling" (1 or 2 secs) when i shut off the engine.

Is there a diagram for the vaccuum system, or color codes? Also, I can see where there are 5 lines going into the cabin, how do I know which is which?

Thanks.

Josh

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81 300D 250K+ (odo doesn't work!)
Want another one.