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Re: Electrical Diagram

To: "Rick Sinclair" <>, "MG list" <>
Subject: Re: Electrical Diagram
From: "Harlan Jillson" <>
Date: Thu, 16 Dec 1999 19:24:39 -0600
   Look at the VIN for you car.  According to the MGB shop manual, aka BMC
service manual, if you car starts out GHN4/GHD4 or later, it started out
life as negative ground, earlier cars were positive ground.  Basically
anything after the introduction of the Mrk.II model in around
November/December 1967 you're looking at negative ground/earth.
   If your Haynes says otherwise, then you've found one of the not too few
errors in Haynes.  Haynes is useful, and has some clarifying pictures, but
don't take it as gospel.
-----Original Message-----
From: Rick Sinclair <>
To: MG list <>
Date: Thursday, December 16, 1999 5:03 PM
Subject: Electrical Diagram

>O.K., who switched my manual on me? Went out to try and fix some of
>the electrical stuff on the 'B, and almost everything I look at in the
>wiring diagram in my manual is different. My car is a negative ground
>(earth) car, and all the haynes diagrams are pos. ground. Is this
>another case of the dreaded DPO syndrome? Does someone know where I
>can find the correct diagram? Your help is appreciated.
>Rory Sinclair       <:-P
>'68 MGB
>P.S. Yes, it is the right manual.

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