speaker wire which is positive

[rosenfe]

79sd green and black wires to speaker,red dot painted on speaker at green wire terminal is this positive?

[79Mercy]

pretty sure the black/green wire is the ground wire.

[LandYaghtLover]

99% of the time, black is ground/negative. Positive is often, but not alway, red or grey with red dots.

[mak]

Hi
Is there a color legend to Bosch wiring diagrams ?Looking at vintage Lucas wiring diaggrams and all the colors are designated for a particular unit .
regards
mak

[MBeige]

Originally Posted by LandYaghtLover

99% of the time, black is ground/negative. Positive is often, but not alway, red or grey with red dots.

+1

Black is negative and the colored lines represent the corresponding speaker corner.

[rosenfe]

the black and green wire was positive,pure black negative--thanks

[tbomachines]

Can always ground against the chassis to check, or hook it up and take a listen. Also, If the speakers are out of phase it is pretty easy to tell, just switch one if so and you're good to go.