E-Z-GO FLEET 1999 Technician's Repair And Service Manual page 121

ACCESSORY WIRING
Read all of Section Band this section before attempting any procedure. Pay particular attention to all Notes, Cautions and Warnings
DVOM (DIGITAL VOLT OHM METER)
The DVOM shown (Ref Fig. 1 on page L-1) is represen­
tative only, the actual model may vary depending on
availability, and is available through the E-Z-GO Service
Parts Department as P/N 27481-G01. For the purpose of
this section, the red probe (+) and black probe (-) are
used. Any DVOM may be used, however the controls,
displays, accuracy and features may vary depending on
the make and model. Always follow the meter manufac­
turer's recommendations and instructions for the use and
care of the meter.
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Fig.1 DVOM
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Repair and Service Manual
TROUBLESHOOTING
In order to effectively troubleshoot the circuits that
include the horn, lighting, brake/turn signals and gauges,
the technician must be able to use the wiring diagram
and a DVOM.
The wiring diagram shows the path followed by a voltage
or signal from its origination point to its destination. Each
wire is indicated by color and is divided into the main har­
ness and the dash harness (Ref Fig. 2 on page L-2).
The technician should use simple logic troubleshooting in
order to reduce the number of steps required to isolate
the problem.
Example 1: If the vehicle will not start and none of the
lights function (or burn dimly) the battery should be
tested before trying to troubleshoot the lighting circuit.
Example 2: If a problem occurs in the lighting circuit that
results in only one of the headlights not working, there is
no reason to check battery wiring or the fuse since it is
obvious that voltage is present. Since bulbs will burn out
over time, the obvious place to start is at the headlight
that is not functioning. If power is present at the connec­
tor and the ground wiring is satisfactory, the only possibil­
ities that exist are a burned out bulb or a poor contact
between the connectors and the headlight.
If power is not present but the other headlight functions, a
wiring problem is indicated between the two headlights.
In some cases where battery voltage is expected, the
easiest way to test the circuit is to set the DVOM to DC
volts and place the negative(-) probe of the DVOM to the
negative battery terminal. Move the positive (+) probe to
each wire termination starting at the battery and working
out to the device that is not working. Be sure to check
both sides of all switches and fuses.
When no battery voltage is found, the problem lies
between the point where no voltage is detected and the
last place that voltage was detected. In circuits where no
voltage is expected, the same procedure may be used
except that the DVOM is set to continuity. Place the nega­
tive (-) probe on a wire terminal at the beginning of the
circuit and work towards the device that is not working
with the positive (+) probe. When continuity is no longer
indicated, a failed conductor or device is indicated.
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