Bose sub......which is pos/neg?!

[joem1cha3l 10+ year member]

hey guys i took out my blose sub in my 350z to tap into it with my LOC and i have no idea which one is positive or negative?? I have a yellow and a blue. Is there a way to test it or do you know? I cant find a wire diagram

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[thevic24 5,000+ posts]

You can always take a 1.5v battery, AA sized, and test it that way.

If the sub moves foward when you test it, that means that whichever lead you have

the batt + on is the positive.

If it moves back then whatevet the batt+ is on is the -