Vehicle Super Probe
- 14 -
Figure 14
WARNING: With this function, if you are contacting a protected circuit, a vehicle’s
fuse can be blown or tripped if you apply ground to it.
3.8 Red/Green Polarity LED
The Red/Green Polarity LED lights up when the probe tip voltage matches the battery
voltage within ±0.4 volts. It is added information that could be valuable to the
technician.
If the circuit you are testing is not within a 0.4 volt (plus or minus) of supply voltage,
you will see the voltage reading on the LCD but you will not hear a tone or see a red
or green LED. This tells you either you have a voltage drop in excess of 0.8 volt from
battery voltage or you are probing a circuit that has an increase of a 0.8 volt or more
over battery voltage. To determine battery voltage, simply remove the tip from the
circuit and press the power switch forward. Battery voltage will then be displayed on
the LCD. The difference between the battery voltage and what is read on the circuit is
either voltage drop or voltage increase. This allows you to determine a voltage drop
without running back to check the battery. It’s just another one of time saving feature
the tool has.
3.9 Following & Locating Short Circuits
In most cases a short circuit will appear by a fuse or a fusible link blowing or an
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