Question for Jelag

[JApol]

As an old electrical guy who understands test equipment let me share a little secret... .



There is a tool called an induction amp meter... ... this amp meter clamps over a wiring loom... .



You install a low amperage circuit breaker in the fuse panel so that it pops on/off and run the clamp of the induction amp meter over the wiring loom... as soon as you pass either the short or ground the induction amp meter will no longer measure load and you have trapped the problem within a 6" section of wiring loom.....

Jelag,

You wrote this as a reply to a popping fuse problem in the 6. 7l forum.



I consider myself a good electrical trouble shooter and have a good knowledge of test equipment. I understand how an induction amp meter works but I have a question about your technique.



In this problem a fuse was blowing for the VGT, the dealer ran a new wire from the fuse box to the VGT to repair the problem. You said to put a lower rated fuse in to trouble shoot the problem harness. Won't that blow even easier than the original? Once the fuse is blown there is no current flow for the meter to use. You can't use a larger fuse because of the risk of letting the magic smoke out.

What do you mean it pops on/off?

I started this thread so I didn't hijakc the original posters thread.

Appreciate the education.

 

[Grizzly]

You might try sending jelag a PM with your question.

 

[PToombs]

If you reread the post, he said "circuit breaker". I took that to mean an automatic reset type breaker, which will kick on and off until the problem is corrected or power is removed.

Hope this makes sense for ya.

 

[Bob4x4]

When you use a c/b on a shorted ckt you can slide the ammeter along the harness slowly. The ammeter will jump everytime the c/b resets. When you have passed the short the meter will no longer jump.



Bob

 

[JApol]

I missed circuit breaker, it makes complete sense to me now.