Is blue wire with white stripe positive or negative?
Usually* the wire with the white stripe or the dashed lines carries the “positive” (+) end, while the other, unmarked wire carries the “negative” (-) end.
What does the white stripe on a wire mean?
The neutral wire is identified by a white stripe, ribbing or white insulation. The hot (live) wire has no ribbing or stripe; it may have black or red insulation. If the cord has a green wire (rare), it’s a ground wire.
What is the blue power antenna wire for?
One thing to note, most head unit wiring harnesses also have a solid blue wire. This wire is typically for power antenna or factory amplifier turn on, do not get this wire confused with the remote turn on wire with the blue/white stripe.