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Les langues disponibles
Operating Instruction
Activate the components with negative
voltage only
EN
Apart from applying the positive voltage,
technician can also use the multi functional
auto tester to provide negative voltage to the
components. The procedures are as follow:
1. Contact the the multi functional auto
tester tip to the negative pole of the com-
ponent; at this stage, the red LED should
be on if the component working correctly.
2. Push the polar switch backward and re-
lease it quickly. If the LED goes from red
to green, you may proceed further test. If
the green LED goes off or the circuit brea-
ker of the short circuit protection tripped,
it means the multi functional auto tester
has over loaded.This may cause by the
following reasons:
The component is short circuit or it has
been connected to the groundl negative
pole directly.
The component is a high current
component.
If the circuit breaker of the short circuit pro-
tection has tripped, it will auto-rest within no
more than 60 seconds. Please operate this
function with schematic and correct testing
procedure because applying voltage arbi-
trarily may cause damage to components.
Use tip to apply negative voltage, which can
be helpful to diagnose the components
Trailer Light Test
To test the trailer light, you need to follow
the procedure:
1. Connect the ground test lead to trailer
ground.
www.herthundbuss.com
2. Probe the tip to the outlet of the trailer;
push the polar switch forward, then
technician can diagnose the function of
the trailer light.
Voltage Test
Technician can also use the multi functional
auto tester assisting with ground test lead to
test the voltage of the circuit. However, dur-
ing the voltage test, pleas do not push the
polar switch.
1. If the probe tip is floating (not contacting
a circuit),the red and green LED turn off.
2. If the the multi functional auto tester con-
tact the probe tip to a positive circuit. The
red positive sign"+" LED will light and the
voltmeter displays the voltage reading
within 1/1 Oth of a volt.
3. If the the multi functional auto tester con-
tact the probe tip to a negative circuit. The
green negative sign"-" LED will light.
Locate missing cylinders
Placing the the multi functional auto tester
probe tip next to a sparking wire(DON'T
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