2016 Trail non-JBL W/ navigation question

[4RunnerBen]

Good morning!

I am about to do a write up on an AudioControl LC2i install with an amp and subs, but I'm stuck at figuring out the polarity of these four little wires. Can anyone help me with this? I saw Mr. Antman's diagram showing a pink/yellow and black/white wire, but I wasnt able to extrapolate the polarities from that. Can anyone shed some light on the polarity of these? The pink/yellow and black/white connect direct to the rear left and rear right.

 

[engineeer]

Do you have a multimeter? If so, use that to determine the polarity.

If not and you want to chance it, GND (-) typically involves black (e.g. black+white, solid black).

 

[4RunnerBen]

Do you have a multimeter? If so, use that to determine the polarity.

If not and you want to chance it, GND (-) typically involves black (e.g. black+white, solid black).

I don't have a multimeter. It's weird that I can't find a wiring diagram online.