where is the ignition on wire on the drivers side fuse box cover or whatever?
all orange wires are always 12v with ignition off so I dunno

The brown 12 guage wire coming down the steering column is on with the ignition switch "ON" for my 03, it should be the same with your 02, check it with a testmeter to be sure.

DD

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Depends on what you are using it for.

Pink is on when ignition is on and while cranking. Orange can be live or on when key is on but not on when cranking.

Brown will be the same as orange and also on when key is in accessory postion.

-Pink wires are +12V in Run/Start at Fuse Block-Left I/P or at Relay Block-Body
-Brown wires are +12V in Run/Acc at Fuse Block-Left I/P or at Relay Block-Body
-Red wires are +12V at all times

How many amps do you need?
Reference Helms 2002, pages 8-42, 8-50, 8-185