hddennis Posted July 14, 2014 Share Posted July 14, 2014 Just purchased a book off eBay dated 1918 covering electrical systems of cars of this era printed by the American Bureau of Engineering. It explains the systems and tells what to do after each step of troubleshooting. The problem is troubleshooting is supposed to be done with an AMBU tester that has dial readings that are scaled to this book. Has anyone ever seen one of these meters? Howard Dennis Link to comment Share on other sites More sharing options...
Bhigdog Posted July 14, 2014 Share Posted July 14, 2014 (edited) It was an early volt/ammeter made by American Bureau of engineering (AMBU) in Chicago. Google AMBU meter for pix. Looking at the diagram/text they are simply using it as a continuity tester. 6 volts on the meter ='s good circuit....................Bob Edited July 14, 2014 by Bhigdog (see edit history) Link to comment Share on other sites More sharing options...
Rusty_OToole Posted July 14, 2014 Share Posted July 14, 2014 I have an old hand held King tester that must go back to the twenties if not older. It is a square bakelite box. One of the test instruments is a spark gap, probably for testing coils. I think there is a vacuum gauge as well. Link to comment Share on other sites More sharing options...
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