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Some small electrical issues

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Captain Cook View Drop Down
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Joined: 23 May 2006
Location: Denmark
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 13 August 2019 at 16:59
A multimeter is a must in the toolbox.
Test if the bulb/diode is OK by using the continuity tester (-I<-). It will show the number 1, and when the probes touch each other you will hear a signal sound and the number will change to something like 212. If you disconnect the + and - wires, and touch the probes at the wire-ends, you will get a "1" if no current is passing the bulb. If the bulb is LED, try the +/- probe on both wires.
LED stands for "Light Emitting Diode", and a diode is a gizmo, that only permits the current to travel in one direction. On some new diodes, you can connect the +/- terminals any way you like, but as a rule, the wires have to be mounted correctly.
To sum it up: If a LED shows no light, try to reverse the polarity.

A reverse of polarity can happen when the mast-light is reassembled.

Edited by Captain Cook - 13 August 2019 at 17:04
Freya H400 #27 (2006), 40HP 3JH4E, 2-cabin, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M603(VHF)+M802(SSB)
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