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B. Connect the short finder across the fuse terminals. C. Close all switches in series in the circuit
that is being testing. D. Turn on the short circuit locator. It sends pulses of current to the short. This
creates a pulsing magnetic field around the wiring between the
fuse box and the short.
E. Beginning at the fuse box, slowly move the short finder along the circuit wiring. The meter will
show current pulses through sheet metal and
body trim. As long as the meter is between the fuse and the short, the needle will move with each
current pulse. Once the meter is moved past the point of the short, the needle will stop moving.
Check around this area to locate the cause of the short circuit.
5. TESTING FOR VOLTAGE DROP
This test checks for voltage drop along a wire, or through a connector or switch
A. Connect the positive lead of a voltmeter to the end of the wire (or to the side of the connector or
switch) closest to the battery. B. Connect the negative lead to the other end of the wire.
(or the other side of the connector or switch)
C. Operate the circuit. D. The Voltmeter will show the difference in the voltage between the two
points. A difference, or drop of more than 0.1 volts (50mV in 5V
circuits), may indicate a problem. Check the circuit for loose or dirty connections.
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