A Testing Board for Ford Service Depots.
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A satisfactory form of testing board, which can be made at a cost of almost next to nothing (as most of the material employed can be found in the average Ford scrapheap or amongst the secondhand parts which usually accumulate in the garage) 'has has been designed by one of our readers and hag proved most useful in dealing with faults sometimes difficult to trace.
The wiring is all from old stator looms, whilst the needles on the armature testing circuit can be made from two long split cotter pins, each filed to a sharp point. It is advisable to bolt the spring clips for the sparking plugs to the coil box, as the earth capacity of a plug alone is not sufficient to cause the h.t. current to jump the points.
No switch is required for the lamp-testing circuits, as the lamps only need plugging into the holders to test the filaments.
The board can be used for testing generator armatures, starters, commutators, 11.4. coils, magneto-coll assemblies, sparking plugs, S.C. and D.C. lamp bulbs.
Referring to the diagram : (1) is a six-volt accumulator, (2) an S.C. lamp holder, (3) a D.C. lamp holder, (4) a six-volt lamp and holder, (5) the armature test needles, (6) an old type coil box, (7) spring • clips for sparking plug, (8) and (9) switches, whilst the letters refer to the various terminals, except for P. and N., indicating " positive " and "negative."