On the originals the third pin is used to flash the dash repeaters via additional contacts in the indicator switch whereas on electronic units the third pin is connected to earth. Originally the mgb used a cylindrical 3 pin flasher unit gfu103 lucas fl5 but this is not the same as modern electronic 3 pin flashers.
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Wiring Diagrams
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Lucasalternators2
Fuel cut off solenoid.
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Wiring diagram for lucas 6ra relay. Wiring behind instrument panel. Service brake check relay behind lh blank panel. Wiring behind lighting switch. This 123 ignition distributor is specifically designed to replace lucas distributors on classic mini engines there is a separate distributor for a plus engines refer to 030804.
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Land Rover Lightweight
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Mgb Wiring Schematic 104 Wiring Library
Ford Escort Rally Preparation
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Lightweight Land Rover Club View Topic Electrical Problem
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Flash To Pass Headlight Flasher Switch
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R R R
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Top Lucas 6ra Relay Wiring Diagram Lucas World Service News Wsn604
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Flash To Pass Headlight Flasher Switch
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Lucas Srb230 33327 6ra Classic Relay 24 Volt
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Overdrive Relay Replacement For Sunbeam Alpines Series Iii Iv V
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Lucas Type Srb111 Normally Open Relay For Vintage And Classic Cars