I'm wiring up a new stereo to replace the cassette unit in the GL (as much as I have enjoyed listening to a tape, the sound quality isn't great).
From memory the three wires are:
Red - power
Brown - earth
Grey/Blue - accidento bizzarro, tutto morte! (possibly electric aerial, think I've always just insulated the end and left it alone).
Is that correct?
Also, I only have old-fashioned (possibly DIN) connectors for the speakers. Although my car has always had 4 speakers wired up (all producing sound), there are only wires for two speakers. I think this is probably related to early '80s head-units only having two speaker channels (left and right), and explains why the early mk2s have a fore-aft speaker balance adjuster by the gearstick.
In this case, I presume I should just wire-up the front speaker outputs off the ISO harness from the new unit to the speaker cables in the car, and whatever magick is responsible for doing the fore/aft adjustment on the current set-up will continue to do its thing. I can't be bothered with re-wiring the speakers at this stage.
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