User Manual

16
POWER TO TESTER WARNING INDICATORS
VOLTAGE INDICATOR
• When the battery supply voltage drops to 9V or less, the MUTT
®
shuts down
power to all circuits and the voltage indicator ashes red. Charging or replacing
the battery is required to continue testing.
• Between 10V-11V, the indicator is RED, showing the battery is too low.
• Between 11V-12V, the indicator is YELLOW, showing the battery is low.
REVERSED POLARITY INDICATOR
• Flashes when battery clamps have been crossed at the battery posts.
• Correcting polarity of the battery terminal clamps deactivates the warning.
• The MUTT
®
is internally protected from polarity reversal.
RED TRAILER WARNING INDICATORS
These signals indicate a fault.
OVERLOAD INDICATOR
• When the MUTT
®
confronts a constant amperage draw above 20 amps or a
direct short, the indicator ashes and the beeper sounds.
• Voltage is cycled to the shorted or overloaded circuit in three second intervals to
aid in diagnosing the extreme amperage draw. (This function is comparable to an
auto reset circuit breaker). The MUTT
®
goes into Pulsar Mode.
OPEN CIRCUIT INDICATOR
• In the instance a selected circuit is not completed through the trailer harness,
(e.g., a faulty ground or no load detected), the Open Circuit warning ashes
and sounds.
CROSSED CIRCUIT WARNING CHARACTERISTICS
• Green Circuit Indicators ash to show troubled circuits.
• In the instance of crossed circuits where a circuit (or circuits) other than the
selected circuit are inadvertently powered by the selected circuit, the unselected
circuit indicators ash while the selected indicator remains steady. This is caused
by worn wires or improperly wired plugs on the trailer.
• In some cases, it may be normal for more than one circuit to be operated by a
single circuit, such as certain ABS systems and custom aftermarket lighting.
• Refer to trailer specic wiring schematics for the unit in question.
GROUND INTEGRITY WARNING
(With the Use of Chassis Ground Cable)
Ground Integrity has been explained in the Testing Procedure (Pg. 12, Section 9).
When the MUTT
®
is rst turned on, Ground Integrity and Open Circuit checks are
being performed. The green lights around the control knob will blink and disappear
one at a time until only the Ground Integrity light remains solid green. When all the
lights blink, it indicates a poor cable connection or a bad ground. Individual blinking
lights indicate an open circuit.