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Old 07-08-2009, 09:44 AM   #15
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Quote:
Originally Posted by Wingding View Post
this is a shot in the dark but i encountered something that sounds close...

what it ended up being was the battery cable to the starter was not tight enough...

I can recall when Michigan State Police cars were having that same problem back in the 70's... Alas, I knew how to fix it.
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Old 07-08-2009, 11:48 AM   #16
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The aim of electrical connections is to achieve sufficient contact between parts so as to be "gas tight." I.e. no matter how hard a political gasbag may blow, he cannot induce any vapor into the joint. The parts need to be smashed together sufficiently that no amount of vibration of the cables or main parts will cause separation of any amount.
I believe w/dielectric grease, the film between contact surfaces gets smashed so thin that the dielectric capacity of the stuff is electrically pierced. Insulators all rely on thickness; more voltage --> more thickness, or said backwardly: thinner insulates less. The important qualities of dielectric grease are the corrosion inhibition in the joint, and the combination of insulative capacity plus corrosion resistance outside the joint.
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Old 07-08-2009, 12:53 PM   #17
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I will agree that di-electric grease, in itself, is a insulator, however it is common to use it in and around electrical connections. The reasons being as posted above.
When used on switches, bulbs, connectors, and the like, the grease is displaced by the mechanical contacts, and electrical connection does not suffer, however outside influence (moisture, dirt, etc) is blocked by the di-electric grease.
Uncle Sam's Army has been using di-electric grease for over 50 years that I personally know of in electrical/electronic applications with no ill effect.
I have used, and will continue to use it in all applications where outside influence might compromise the integrity of an electrical circuit.

Bill
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Old 07-08-2009, 05:33 PM   #18
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This question of whether dielectric grease helps or harms an electrical connection can be resolved by experiment.

Put some dielectric grease on the contact portion of a battery terminal and the cable connector. Tighten the cable connector as you would normally. Then use an Ohmmeter to check for electrical resistance from the terminal to the cable connector. If the resistance is zero (0), then the grease is not causing an electrical connectivity problem. If there is significant resistance, then the grease is likely the culprit.

Well, in fact, I've done this. The measured resistance is zero.

The dielectric grease does its job by keeping moisture and other contaminants from invading the electrical contact points. Thus, the electrical contact points do not corrode.

By the way, you could use conducting grease in the contact, but that would be dangerous, since some of the grease might ooze out and provide an un-wanted electrical contact (a short). Therefore, the non-conducting grease is the better choice.
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Old 07-08-2009, 09:13 PM   #19
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This may clear up some questions on the grease.
YouTube - Dielectric Grease Review - etrailer.com
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Old 07-09-2009, 09:30 AM   #20
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Even though I was an Electrician aboard Diesel-Electric Submarines in a former life, I am not above correction when practices change or improve.
Consequently, proven performance is something I cannot ignore and will give credit to.

I have learned something, am corrected and will offer no more comments based on outdated practices.

Thanks to you all.

Bob
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Old 07-09-2009, 10:50 AM   #21
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rmmpe, I learned something as well! Your comments would be appreciated by me, with the current state of the RV industry we need all the help we can get. This subject has always been on my mind but I never took the time to research it. I too was mystified as to why an insulator could give a better connection. I did find that if you buy it in larger quantities it is substantial cheaper.
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Old 07-09-2009, 04:54 PM   #22
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Flagelpater,

Learning is what I do best. And this is a good place for it.

The worst thing about this entire exchange is that TedIII was right (but, as they say; "Even a blind squirrel gets and Acorn once in a while").

Ted,
How's Carol?

Peg says Hi

Bob
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Old 07-09-2009, 06:55 PM   #23
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Bob, she is trying to get the D*** acorn open, otherwise fine. Say Hi to Peg back.
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Old 07-09-2009, 08:32 PM   #24
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Ted,
I open mine by hitting it so it makes a sound like a polished 10 penny finishing nail hit with a greasy ball-peen hammer.
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Old 07-11-2009, 12:36 AM   #25
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Bob- when you hit it, does it make an acorn shaped impression on your forehead ?
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Old 07-11-2009, 01:20 AM   #26
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Great video except for the second sentence uttered. The part that says di-electric grease is grease that conducts electricity.
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Old 07-11-2009, 02:12 AM   #27
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The electrical industry uses something called NO-OX-ID. There are two voltages; 600 and below and 600 and higher. It's great stuff, and totally prevents corrosion on electrical terminals. I use it for every battery and electrical connection I have been able to get to in the APEX. I also used it on the battery terminals on the cars, and when I had my boat on every one I could get to in the boat. Corrosion in a boat is a real problem. However, next pre-trip, I need to check connections on some places I have neglected and tighten them.
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Old 07-11-2009, 05:40 AM   #28
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Mike,
Not at all. But it sure takes care of headaches.

Pride,
Kinda makes you wonder about it, yes?

Monty,
I'm gonna get me some of that!

Ted,
Carol IS your Acorn.

All,
If he's looking at these posts, the fella that asked why Alpines are so great should better understand why we make as many posts as we do on the Alpine forum. It's as much a group of friends as a place to echange ideas and banter.
A really great community.
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