95 Toyota Previa light flash

I am current newby installing a DEI Diablo2 alarm and have found all the wires except one the parking light flash. Do you know if the parking light wire from the switch is a negative output? I tested it with a DMM but didn't get any readings. I guess if it was negative output I shouldn't see any readings. I would like to jus ground the wire from the switch and they should turn on or indicate closed circuit if I use Ohm on my DMM but don't want to short anything out. I believe the wire at from the switch is white to the connector and is Green-Black after. Should I use a relay if it is? I should mention that the alarm has a positive and negative out-put Bernie

parking light wire should be green in the DKP and it's positive

Nope, Its in the seat belt relay box green-red wire and it's negative it also can be wired from the switch, now if I could only figure out the door trigger wire I'd have this thing licked but I haven't figured out which wire it is and where it at. Bernie Franklin