Honolulu star-bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1912-2010, 1917-06-23

be determined as explained above.
lh) Open circuits due to loose con-
nections at, battery, starting switch,
motor terminals or ground connec-
ton: very poor contact IN starting
switch; dirty or ronghened commute
tor; worn brushes; brushes not fitted
to the surface Of the commutator; i'm
proper pressure on the brushes: arma-
ture or field winding burnt out. 80
fcl Short circuits or grounds In
starting switch, wiring or motor, due
to insulation being worn off Of the con-
ductors BY metal .cleats, sharp bends,
around the metal covers, Insulation de-
stroyed by heat, water and grease, &c.
Starting Motor cranI<s Engine Slowly
When the starting motor cranks the
engine below the proper speed 1T may
be due to any one OF the following
causes: 80 49, :. = +.
la) Battery partly discharged or
very cold, thus lowering its efficiency.
(h) Poor contacts In motor circuit,
usually at battery terminals, starting
switch contacts. or the commutator Of
the motor; in fact and condition which
win not result In an abnormal amount
Of resistance being introduced into the
circuit s. 81
Simple Testing Equipment 5. 3 3
q A 6.yolt lamp IN q small socket and
provided with testiAe ppiits connect
ed to Il By Means 81 lamp cord may
be used IL locating practically an
kinds OF trouble on q starting ana
lighting system when the operator f.
familiar with the wiring diagram o.
the system or has at his disposal 81
diagram which he can readily follow.
For repair shop use the best points
may be made similar to the ones
shown In Fig. For emergency use
any two lengths Of wire with barred
ends usually win serve. q. u
How 20 Locats an Open Circuit 81
The use Of the test points in locat-
ing an open circuit may be shown by
taking the circuit shown IN Fig. AS
Stunning you are going to use the bat.
terry IN the car in making the tests you
may proceed as follows: s.
Connect one test point to the post
tive terminal of the battery and the
other point to the negative terminal
With these connections made the test
lamp should light up to its full can.
die power unless. the battery il in q
discharged condition Assuming the
battery h found to be properly.
charged. move the test point from the
negative terminal or the battery to the
terminal or the switch where the wire
d is connected and II the lamp lights
the wire d il o. K. Next move the
test point Pc to the terminal OF the
switch where the WIRE c Is connected,
and u the lamp lights with the switch
closed the switch Is o. X. Is
Next move the test point P2.to the.
right hand terminal Of lamp La, and IL
the test lamp burns the wire G is o. k
Next move the test point P2 to the left
hand terminal OF the lamp IL. When
this last connection is made the test
lamp and lamp ~ win be connected In
series across the terminals OF the bat
terry. II lamp L2 is o. K. the filamentI
OF the test lamp VIII brighten up, but
not to me same extent II did when con-
nected to the right hand terminal OF
the lamp. Next move the test point
P2 to the right hand terminal or lamp
II, and II the test lamp gIows the
same as when the test point P2 was
connect TO the left hand terminal Of
lamp IL then wire b is o. X. Lamp
Ii may be tested by moving the test
point P2 70 the lift hand terminal. Of