is it a positive gound???


Asked by Jan 01, 2015 at 01:17 PM about the 1978 MG MGB Roadster

Question type: General

does the positive go to the ground ???

8 Answers


not sure what your working on but no positive never grounds unless you are attaching batteries in series. but if you are using one positive and one ground then red is positive and black is ground. positive is the power feed direct to the unit being powered and black is the ground and if there is a white it is usually a neutral wire which then is also used like a ground.

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it is a 78 mg b does the positive post to ground strap.?????

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Positive ground simply means that the positive (+) cable bolts to the frame. HTH. -Jim

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no it does not go to positive ,please never ground a positive wire it can cause harm to you and what you are working on


You're MG is a negative(-) ground system. HTH. -Jim

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For the record there were cars that used a positive (+) ground system. Cadillac, for example, used a positive (+) ground system through 1942. After World War II the 1946 models were negative (-) ground. HTH. -Jim


The 1978 MG-B is negative ground All the MG-A series and before were positive ground. They also had two 6 volt batteries. Most all English cars of the 50-60's were positive ground.

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I just got a 1975 MGB GT and I believe the + is the ground. I also have a shop manual that goes up the 1974 models and the diagram shows a + ground.

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