Alpine 1390L Tuner

[Old School Alpine]

Hi All, does anyone have a user manual for the Alpine 1390L, or at least be able to tell me what the black wire on this unit is for? I assume it's the ground wire,
but I hate to assume! There's a blue wire, and it's labelled power ant., but the black isn't labelled!

Thanks in Advance

[Perry Babin]

Measure the resistance from the wire to the case of the tuner. If it's ~0 ohms, it's almost certainly a ground wire.

[Old School Alpine]

Originally Posted by Perry Babin

Measure the resistance from the wire to the case of the tuner. If it's ~0 ohms, it's almost certainly a ground wire.

You da man Mr. Babin, you da man ~0 ohms!!

Thanks