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01-28-2014, 10:29 PM
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#1
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Rivet Master
1962 28' Ambassador
1961 19' Globetrotter
1962 26' Overlander
Mesa
, Arizona
Join Date: Jun 2013
Posts: 5,996
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How to know when OLD fuses are done?
Aside from the obvious of something not working inside, how does one know when these old fuses are done (broke/blown) as you can't see into them.
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Hittenstiehl
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01-28-2014, 10:33 PM
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#2
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Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
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Put an ohm meter or continuity tester across it. If you have infinite resistance the fuse is toast. (and not the tasty kind).
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Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
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01-28-2014, 10:41 PM
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#3
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Rivet Master
1962 28' Ambassador
1961 19' Globetrotter
1962 26' Overlander
Mesa
, Arizona
Join Date: Jun 2013
Posts: 5,996
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Thanks Dave will give that a try. And then what are these still available or is this a mute point and should it just be changed out to modern?
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Hittenstiehl
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01-28-2014, 11:26 PM
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#4
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3 Rivet Member
1972 Argosy 26
1973 Argosy 26
Fairmont
, West Virginia
Join Date: Jan 2009
Posts: 249
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There still Available
You can still find them. Small hometown hardware, or even ebay.
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01-29-2014, 01:04 AM
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#5
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Rivet Master
1982 28' Airstream 280
Port Angeles
, Washington
Join Date: Aug 2008
Posts: 1,942
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I'm sure it was assumed but remove the fuse to check with an ohm meter. Also they can be checked in place with a test light or volt meter. With the power on there should be the same voltage present on both ends of the fuse. These fuses are also available at Home Depot and Lowes.
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Cheers, Dan
________________________________________
"Socialist governments traditionally do make a financial mess. They always run out of other people's money. It's quite a characteristic of them."
~ Margaret Thatcher ~
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01-29-2014, 03:49 AM
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#6
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Rivet Master
2006 25' Safari FB SE
Broadway
, North Carolina
Join Date: Mar 2007
Posts: 838
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Quote:
Originally Posted by Hittenstiehl
Thanks Dave will give that a try. And then what are these still available or is this a mute point and should it just be changed out to modern?
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It should not go unsaid that they need to be removed before testing for continuity with an ohm meter.
__________________
2006 Safari SE FB
2000 F150 4.2L (retired), 2011 F250 6.2L, 2010 ML550, 2000 Excursion 7.3L
Broadway, NC
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01-29-2014, 05:52 AM
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#7
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4 Rivet Member
2015 30' Classic
Green Cove Springs
, Florida
Join Date: Jan 2013
Posts: 285
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If you do not have any of the testers. Which you should. If you have a good ear and it popped it has a sandy noise when you shake it. This is a OLD electrican way of a quick test. They are still ava. at most any big bog hardware stores. You should always have extras so pick up several when in there.
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01-29-2014, 07:23 AM
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#8
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Rivet Master
1966 22' Safari
1954 22' Flying Cloud
Saline
, Michigan
Join Date: Aug 2011
Posts: 854
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While it's true about 'if it's not broke don't fix it", spend a couple bucks and replace them. Technology has improved since the 60's.
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01-29-2014, 07:40 AM
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#9
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Rivet Master
1962 28' Ambassador
1961 19' Globetrotter
1962 26' Overlander
Mesa
, Arizona
Join Date: Jun 2013
Posts: 5,996
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Thanks everyone for your answers. Post a question late at night and have your answers early in the morning.
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Hittenstiehl
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01-29-2014, 07:48 AM
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#10
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Rivet Master
1974 Argosy 26
Morrill
, Nebraska
Join Date: Nov 2009
Posts: 6,014
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While an ohm meter will find most blown fuses. It will not find one that has slowly cooked and melted the fuse link. But left a carbon trail.
Testing a fuse under a load is a better test. While not always a convenient method.
Periodic replacement is an inexpensive option. Along with keeping the fuse clips and barrels clean. Lose connections of the wires at the fuse holder creates heat and will cause the clips to become weak.
Upgrading to the more modern type fuse holder is another option.
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01-29-2014, 01:19 PM
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#11
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Wise Elder
2010 30' Classic
Vintage Kin Owner
South of the river
, Minnesota
Join Date: Dec 2009
Posts: 4,169
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Quote:
Originally Posted by Hittenstiehl
Thanks Dave will give that a try. And then what are these still available or is this a mute point and should it just be changed out to modern?
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Those are standard 30 amp cartridge fuses, still in widespread use, and available at any home center or hardware store. They are inexpensive and reliable. If problems arise it may make sense to polish the contact surfaces on the fuse and fuseholder with some emery cloth or 400 grit sandpaper. Identical replacement fuseholders are available from Grainger and electrical distributors and some home centers.
The wires that go through the aluminum slot at the top of the picture should have some sort of protection against being cut by the aluminum.
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To learn to see below the surface, you must adjust your altitude
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01-29-2014, 01:29 PM
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#12
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Rivet Master
1966 22' Safari
1954 22' Flying Cloud
Saline
, Michigan
Join Date: Aug 2011
Posts: 854
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Replace with glass fuses ($.25 a piece)and you'll never again wonder if they are blown or slow arced.
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