pos or neg trigger

Is there a way to put a meter on a wire to find out, I am installing a viper 571 on a 2000 infinity and wanting to make sure i hook the parking lights up correct. One place says the wire under the dash are positive trigger and someone says the factory service manual say they are neg, I want to know how do you tell?

Is there a way to put a meter on a wire to find out,

Are you really asking this question? YES, of course there is.

Do you know how to use your DMM?

It's THAT simple. I don't mean to sound disssrespectfullll It's just that, this is basic install 101.

thanks for your help

Infinity what?

Some are POS+ and some are NEG- and a few have both.