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Voltage Tester


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#1 Min E

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Posted 28 November 2009 - 12:59 PM

Hi all.

I sincerely hope no one takes offence over this post. I do not in any way wish to insult the inteligence of any members.

But....

There have been an awful lot of threads started to do with faulty electrics lately.

It would seem that many Mini owners do not possess any means of testing for voltage.

Below shows how to make a very simple emergency tester.

I strongly suggest that the purchase of a voltage and continuity tester is a must. They are not expensive, less that a fiver, and can save an awful lot of time and head banging.

They are easily available from your local car accessory shop or Maplin and are very easy to use.

In the mean time I have 'knocked up' a very simple emergency voltage tester which might help some members out.

Use a low wattage bulb something like the one in the curtesy light, you could even 'borrow' the one from your courtesy light temporarily if you haven't got a spare.

The one in the picture is an indicator bulb; it's fine but it is brighter and can get a bit hotter to hold.

Strip about 3" of one end of a length of wire, wrap it round the metal body of the bulb and twist it tight then strip about 1/2" of the other end of the wire...That's it!

It is a good idea to put some insulation tape around the metal body of the bulb to prevent accidentaly touching it to earth.

To use it simply hold the end terminal of the bulb against an earth on the car body (or engine) and touch the end of the wire to the contact point you want to test for voltage.

When using it don't make it light for too long as the bulb will get hot, a flash is enough to tell you that you've got voltage.


I really hope this is of use to somebody.....



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Regards.
Dave.

Edited by Min E, 01 December 2009 - 01:38 AM.


#2 dklawson

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Posted 28 November 2009 - 03:05 PM

I have a test lamp like the one shown above in all my cars (new and old). They are very, very useful. In addition to helping you find open circuits or loss of power, you can also use them to set static timing on cars with points and you can (in desperation) cut off bits of the wire to splice over damaged parts of the loom while you're on the road. One addition that I make to the photo above is to take the wire that's wrapped around the base of the bulb and liberally and neatly wrap it with electrical tape (leaving the tip exposed of course). The tape not only prevents you from accidentally shorting the wire to earth when it is "hot", it also is a source for emergency electrical tape for the splices I mentioned above.




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