Checking electrical wiring harness of automobile

Hello Matodkar. Ravindra

Please advise exactly what you are hoping to "check" with non-contact type of instruments.

There are many variables:

1. Connection lugs
2. Plugs
3. Sockets
4. Thickness of insulation
5. Integrity of wrapping tapes
6. Sizes of wires
7. Number of cables
8. The list goes on, and on....

If you advise your location, it would assist in answering you correctly, thank you.

Please reply here, with your specific needs stated clearly

Kind Regards....

1) Continuity

2) Cut on insulation, leakage of current THROUGH INSULATION

3) Open joints( Not covered by wrapping tapes)

4) Scocket (Coupler shot moulding defect)

5) High current flowing related root cause parameter.

( What we are looking for is all for wiring burnt defects detection instrument )

Don't know of any one that makes it. Some type of snifter to to detect gases coming off of insulation. Similar to the one use in HVAC to detect refrigerant leaks. The most common plastic used for wire insulation is PVC. When heated it gives off a chlorine gas.

the device is called a draeger tester/meter . the unit itself has different vials that respond to different chemicals in the air or more to my experience in the closed in work areas. they are very expensive you won't rent one from a local rentall place.

'da ber

I have given below my 5 Nos.of point as my requirements clearly .Please go through & answer

Hello again, Matodkar. Ravindra

<"I have given below my 5 Nos.of point as my requirements clearly .Please go through & answer">

It appears that you have no points as your requirements, because there were none listed in your above Post.

So, of course, there is nothing to go through, and indeed, nothing to answer either.

Perhaps you intended to mean your ABOVE Post: http://cr4.globalspec.com/comment/187486/Re-Checking-electrical-wiring-harness-of-automobile

These tests are not presently truly possible, nor practical, nor able to be guaranteed, with non-contact type instruments.

If you were planning to design such a set of instruments, go right ahead, and I'm certain that plenty of happy buyers will be knocking on your door, once you have the instruments perfected.

Get yourself a day job in the meantime, because I cannot see such instruments being commercially available for many years.

Hope this advice proves useful to you.

Kind Regards....

Hello gain, Matodkar. Ravindra

I know of no non-contact instrument to test for those faults, other than a good pair of eyes, and the associated nose with its molecular receptors, sensitised to Chlorine, Hydrogen Cyanide and other compounds issued by heated insulation.

Kind Regards....

visual inspection is the only solution when you want non contact testing.

When is dark turn on all accessories then start engine and watch the display

Matodkar. Ravindra,

If the wiring harness has been removed or if you can pass an isolated current through the wire it is possible to use and AM radio to check for stray leakage etc.. Rudimentary true but wave the antenna over the wire and use an ear phone.

What you are saying is probably quite true, I wear hearing aids, if I want to know for instance if my central heating pump is running, I only have to put the aid in the loop position, or do they call it leaky earth position? then I hear it running electrically quite distinctly, the same applies to small elecrical transformers such as a door bell TX. which I hear if in the immediate vicinity with the aid in this position.

never heard f or seen that way of circuit test evaluation being done on a 24 volt system or lower,please relate the method you use and equipment requiredto do this style of testing other than insulated head phones which obviously be the most important to have on hand required thanks

'da ber

If the surroundings are very quiet or your hearing is acute an earphone may not be needed.

Other bands of radio receiver is also capable of detection; a "CB" for example works well because of the squelch control.

I've used a "CB" radio to discern a scope from bad wheel bearings to electrical anomaly and no earphone required.

Note: do not touch the antenna to the wire but wave over the wire.

Clamp-on current-meter is the only non contact type of instrument.

In Aids you include the most-important & the very 1st aid is "Visulal-Inspection"

Ramvinod, Haajee,

I respectfully submit that 100% visual inspection is not 100% effective. And will not reveal to you if conductors are broken inside the insulation, nor any other electrical attributes or properties.

Companies that rely on visual inspection are called "defendants" here in the US, because the failures get passed through to the customer despite their visual inspections and they are sued in our courts for damages.

I do not know why so much credence is given to visual inspection, but I'm not a fan of it.

milo

Regards.

I just aggree with your remarks:

<100% visual inspection is not 100% effective>

I replied according to the Questions Text.

I had been in the field of Repairs, Trouble-shooting & Finally INSPECTION & Quality-Control for quite a period.

I feel that Visual-Inspection is only one of the steps of inspection, repairs etc etc.

Use of Test-Equipment is most essential for Testing, Repairs

Are you working on a particular automobile or looking for general use tool for multiple cars?

Hey Don't you guy now that all electrical thing run on smoke start everything and look for it if no smoke it will be the thing that is not working just a joke no offence intended you mite look at Snap-on ,com or Mac .com they sell a few different testers most like the Phone CO some contact needed.

Bad news, it does not exist, sorry.

If such a tool was available I would have it.

Visual inspection and a multi meter.

It's alot easier to destroy a harness than to check it. All you reall need is good vision and any old ohm meter with long leads.

Bill