EarthX 12V-5MM LED Fault Light Panel Mount Indicator

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Part# 11-17281
MFR Model# 5MM-12V


Easily see if you have a battery fault with this 5mm Red LED light for your EarthX experimental aircraft.

The 12V LED has a built in resistor for easy installation and compatibility with a 10-15V electrical system. Details installation directions are located in the EarthX manual but it is very simple. To install, connect red wire to a positive bus connection, connect the black wire to fault monitoring wire (also black) that is located on the EarthX battery.
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WARNING: Cancer and Reproductive Harm -


  • Color: Red
  • Mounting: Nut and Washer (included)
  • Termination style: Wire 20ga- 48″ length
  • Voltage: 12V
  • Built in resistor: 500 ohm, 1/2 Watt
  • Drill bit size: .325 or 5/16″


  • The positive wire (red wire) of the LED should be connected to the electrical bus (12volt positive), typically to a fuse/breaker downstream of the master switch. The negative of the LED (black wire) should be connected to the fault monitor wire (wire out the side of the battery) of the battery.

  • Step 1: install the 12V LED light thru a hole in your control panel.
  • Step 2: cut the black wire to length desired for your installation so the LED’s black wire reaches the battery.
  • Step 3: use a wire stripper to remove ¼” of the wire insulation so you can attach the “male” spade connector to the black wire. Crimp the male spade connector to black wire.
  • Step 4: plug the male spade connector into the end of the pigtail wire from the battery.
  • Step 5: connect the red wire to an electrical bus fuse/breaker (.25-1 AMP). May have to untwist wire and cut to length. Most of the time it is most convenient to connect to a fuse on the back side of the panel. If not, it could also be connected directly to the positive terminal of the battery with a ¼” ring lug connector.
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High quality 12V LED unit for panel mount. Threaded, metal body for secure mounting. Used for Alarm signal output from EFIC and EarthX battery. Very nice product.

Tom C
March 26, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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