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BMW Mini Cooper
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General
Wiring Harness Overview
Created: May 24, 2013
Information and Overview of the Mini Cooper Wire harness
HOW TO CONVERT FROM GENERATOR TO ALTERNATOR
Created: September 16, 2005
Minis built up to 1969 (i.e. MKI  &  MKII) were positive ground while MKIII and onwards were built negative ground. The polarity of the alternator can not be changed, so if the alternator you have does not conform to your car, you must change your car. 
Classic Mini & Cooper Wiring Diagrams On-Line
Created: February 19, 2002
Wiring diagrams for a variety of Minis and Mokes are now available from our huge Technical Information archives!
How to change battery polarity
Created: January 29, 2000
When fitting a new or rebuilt generator to your Mini, certain instructions will usually be found with it. These instructions advise the course of action to polarize the unit and are the same instructions for changing the cars electrical system from positive to negative earth or vice-versa.