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September 29th, 2008

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Q & A: Electrical Problem

Tuesday January 03rd, 2006
Q & A, MGA, MGB, MGC, MG T-Type, Midget
Dear John,

1. As most "Dear John" letters begin, I am having a problem with our relationship (me and my MGB). I have a '79 MGB. For months now, when I step on the break or use my turn directional signal I lose my Tach, gas gauge, temp gauge, radiator fan and break lights. Normally, they return within a few minutes and go out again at the next touch of my break pedal. This time, however, they have not returned. I have replaced the relay switch, cleaned the fuse connections, checked wire connections. I don't know if either of these are related to the problem but, my ignition light is always on (two years), and I recently replaced the ignition switch (several months ago). Some of the greatest technical minds in our club are scratching their heads on this one. Can you help? Thanks.


2. I squeezed the fuse tabs together, even put in new fuse, cleaned tabs and connectors but problem still exists. There are two relay switches on the wall. Should I replace them?

Bill
Bill!

1. 1979 MGB. Ignition switch to "ON" closes the ignition relay. Ignition relay closed energizes the third fuse (WHITE/BROWN front side and GREEN rear side). The problem lies in one of these three components. If th... read more