GxT Ferret 63 DIAGNOSTIC ENGINE ANALYZER - Manual (Page 32)

When power is applied to the analyzer it does a self-
check and will indicate a problem if one is found. Also
during operation, checks are done to verify that neces-
sary test signals are working. If a test will not work or
the analyzer indicates abnormal operation, the leads
associated with the test should be checked as described
below before sending it in for service.
If the analyzer will not respond to the keys, disconnect
power and try again. Be attentive to the connectors in
the battery cable. Wiggle them to detect intermittent
connections. Apply 12 volt battery to power leads for all
checks. The analyzer does not have any user service-
able internal parts.
BATTERY POWER LEAD CHECK
If the display does not appear after 10 seconds when
hooked to a 12-volt battery try the following substitution:
Plug the Coil Primary/Auxiliary Lead into the analyzerʼs
12-volt battery panel connector. Connect the red Auxil-
iary Clip to the 12-volt battery plus, and the green Coil
Primary clip to minus. Be sure the battery is good. If
the analyzer display appears, the analyzer works, so the
power lead must have a bad connection. If the display
does not appear after 10 seconds the analyzer probably
needs service.
The Black clip goes to the three center conector contacts,
and the Red clip goes to the end contacts.
COIL PRIMARY LEAD CHECK
Press IGNITION PRIMARY. Do the following test while
watching the analyzer "Drvr" reading: using a 1.5 volt
flashlight cell (AA, C, or D): touch the cell minus terminal
to the black Battery Power Clip; touch the green Coil
Primary Clip to the flashlight cell plus terminal. If the
reading is 1 to 2 volts the lead is okay. If —-v shows,
the cell is backwards but the lead is okay. If there is no
response the lead is open.
AUXILIARY VOLTMETER CHECK
Press CHARGING STARTING. Use SELECT and read
the "Aux>NEG" voltage. Touch the red Auxiliary Clip to
the analyzer red Battery Clip. The "Aux>NEG" reading
should match the "Bat" reading within 0.05. Also touch
the red Auxiliary Clip to the black Battery Clip to see a
reading of 0.00 within 0.05. If there is any response the
lead is good. If the readings are not correct the analyzer
needs service.
AMP PROBE CHECK
Press CHARGING STARTING to be able to read the
Amps display. Be sure that the probe is away from wires
and magnets. Press AMP ZERO. It will not operate if
the current sensed is over 20 amps during a zero check.
Wait a few seconds and watch that the reading is 0+/-1.
Wiggle the connectors to check for intermittent connec-
tions which would show that the probe cable has failed.
If the amps reading is zero it should be okay. If instead
of a reading the following display appears, the probe or
analyzer has failed.
Press START to continue. Unplug the amp probe from
the analyzer and press AMP ZERO. If the amps read-
ing does not become 0 +/-1 the analyzer needs service.
Otherwise the amp probe needs replacement.
EXTENSION HARNESS CHECK
There are four identical 5-wire cables within the Exten-
sion Harness. First connect them all in series so that
at one end there is a pair of free ends. To put them in
series, on one end of the harness put red to yellow and
green to blank, then on the other end put green to yel-
low and use the remaining red and blank ends for the
analyzer and test lead connections.
Check the cables by plugging the series linked harness
from the battery power lead set to the corresponding
analyzer connector. The display must turn on. Press
CHARGING STARTING to see that the battery voltage
reading is normal. Wiggle the connectors to check for
intermittent connections. If the display does not come
on or the reading is too low, some wires are open and
the test should be tried with each separate cable in the
harness to find the bad one.
TIMING LIGHT CHECK
Triggering the Timing Light depends upon pulses from
the spark pickup. To make the light flash without hooking
it up to an engine, set up the "SPARK PICKUP CHECK"
on the next page to get trigger pulses to the pickup. Then
press the light's trigger buttons to see if it will flash.
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ANALYZER SERVICE
AMP ZERO Bad: 2 AMPS
See OPERATORS MANUAL