How do wire amp and base box to factory head unit to my astra?
Answers:
depends if your head unit has a pre-out or not. usually they taxi-spec radios don't have but refer to your car handbook or ring yer local dealer. if it does have a pre out you'll need. a live feed for your amp, best directly from the battery with a fuseable link. cable from amp to head unit (to the pre-out mentioned before) cable from amp to box. earth for amp. all cables easily available from whichever place you buy the box from
If its a Delco system,all leads should be at rear of unit.If you have code pull unit out and have a look.Or look in your unit manual it should tell you in there.
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