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When Did Mgb Change To Negative Earth? [Solved]

MGB models built before November 1967, when the Mark II was introduced, have a Positive earth electrical system. There are a number of advantages to be gained by converting these cars to the later Negative earth system. The early cars were fitted with a dynamo, which was barely adequate for the job.

242 MG Tech | Converting the Tach from Positive to Negative Earth on MGB

How to reverse the polarity on your tach. Watch closely.

278 MG Tech | Converting Positive Earth Tachometer

MG logo

Converting our 67 Mini Moke from positive to negative ground

The cuteness of positive