• The tester is able to help diagnosing the condition of glow plug without
  removing it from the engine.
• This tester is working for 12V system, tester can be energized by 12V
  vehicle battery directly.
• The 6 LEDs will indicate condition of the glow plug and the vehicle battery.
• Switching off the engine, disconnect the wire connecting with the glow plug.
• Connect the balck battery clip to the negative of the 12V battery and the
  red battery clip to the positive of the 12V battery.
• Push the testing probe to contact with the glow plug properly.
• Read the LED indication:
• Glow plug is short circuit.
• >16A  Current is greater than 16A.
  If the LED light up for less than 3 seconds, it is normal.
  If the LED light up for more than 3 seconds, glow plug has problem.
• OK     Glow plug is in good condition.
• <7A    Glow plug has problem, resistane is too high.
• Glow Plug is open circuit.
• <10.5V  Voltage of vehicle battery is too low, not enough to complete the test.

• The tester is able to help diagnosing the condition of glow plug without
  removing it from the engine.
• This tester is working for 12V system, tester can be energized by 12V
  vehicle battery directly.
• The 6 LEDs will indicate condition of the glow plug and the vehicle battery.
• Switching off the engine, disconnect the wire connecting with the glow plug.
• Connect the balck battery clip to the negative of the 12V battery and the
  red battery clip to the positive of the 12V battery.
• Push the testing probe to contact with the glow plug properly.
• Read the LED indication:
• Glow plug is short circuit.
• >16A  Current is greater than 16A.
  If the LED light up for less than 3 seconds, it is normal.
  If the LED light up for more than 3 seconds, glow plug has problem.
• OK     Glow plug is in good condition.
• <7A    Glow plug has problem, resistane is too high.
• Glow Plug is open circuit.
• <10.5V  Voltage of vehicle battery is too low, not enough to complete the test.