At 05:53 PM 12/19/2006 -0800, you wrote:
>
>> Anyway, once you've pulled all the fuses, and found what
>> circuit you have a
>> short in
>> how do you all find the short in the harness.
>
>Basic idea is to run current through the circuit but limit heat dissipation;
>then use something to detect the current. JZ Witless used to sell a flasher
>thing that would replace the fuse, and a moving vane meter that was
>sensitive to magnetic fields. I've done something similar using an old
>headlight bulb to limit the current, and a boy scout magnetic compass to
>detect the magnetic field.
>
>> Same goes for an open. You've got something that doesn't
>> work, how do you
>> find where
>> the break in the wire is?
>
>You can pick up a toner & probe for just about $50 if you shop around ...
>
>Looks like JCW still has the short detector :
>http://masl.to/?I2CE1166E
>or if that doesn't work, go to
>http://www.jcwhitney.com
>and search for "short circuit finder".
Randall,
Thanks. I haven't been able to access JC Whitney. But I did a search
a while back for the telephone toners. Got quite a list ranging from
about $70 up. I was thinking about this one:
http://www.contractor-books.com/EX/40180.htm
RC-EX-40180 Tone Generator and Amplifier Probe Kit - $79.99
For the application at my dad's and probably the cars, we needed a
self powered toner to make the line hot. Then using the wand follow
the tone until we found the problem. In the car, I'd think that you'd
loose the signal at the break or short. But haven't tried it yet.
I like you idea of the light and the compass. Very ingenious!!!
John
John T. Blair WA4OHZ email: jblair1948@cox.net
Va. Beach, Va (eBay id: zebra48-1)
Phone: (757) 495-8229
48 TR1800 48 #4 Midget 65 Morgan 4/4 Series V (B1106)
75 Bricklin SV1 (#0887) 77 Spitfire 71 Saab Sonett III
65 Rambler Classic
Morgan: www.team.net/www/morgan
Bricklin: www.bricklin.org
If you can read this - Thank a teacher!
If you are reading it in English - Thank a Vet!!
|