BARRY CHECK 6
Joined: 15 Mar 2011
Posts: 738
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 Posted: Mon May 12, 2014 9:33 am Post subject: Stray current |
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Gary:
It sure is possible for the switch to draw current even in the OFF position. Why? Because the switch has failed and there is some current path - Carbon, Dirt, Water in the switch causing the problem. Consider the Rocker Switch - It sits in an area that can get wet when the canopy is open and exposed to rain, it can also leak in at the turkey baster OAT probe and run to the switch; it is also a switch that is facing UP and ready to collect all sorts of dirt ... And drilling take place on the window bow? Metal filings.
By-Pass the switch and take your current readings again. Or just put in a new switch.
You can use a heavy duty Electrical Contact Cleaner that is used on motors (not electronics) and see if that displaces/cleans the switch.
Barry
On Tue, Apr 8, 2014 at 1:25 PM, <CYNAMONB(at)aol.com (CYNAMONB(at)aol.com)> wrote:
[quote] Bad cabin light switch that functioned normally after being cycled, maybe due to internal corrosion? The switch may have been passing some current but not enough to be noticeable at the bulb.
Bruce Cynamon
bruce(at)petersonindustries.com (bruce(at)petersonindustries.com)
In a message dated 4/8/2014 1:11:32 P.M. Eastern Daylight Time, teamgrumman(at)yahoo.com (teamgrumman(at)yahoo.com) writes:
| Quote: | I have a Tiger in my shop that has a battery run down after a couple of weeks. The previous owner (more than 6 years ago) put a switch on the panel to shut off the clock because, apparently, the battery kept going dead.
I removed the negative cable and put a voltmeter/ammeter between the battery and the ground wire. With both fuses on the battery removed, there was no current. With the clock fuse installed, clock on, 7.54 mAmps. With the clock off and the Hobbs(Note: no Hobbs meter)/Cabin light fuse installed, lights off, 5.33 mAmps. Lights on, 8.23 mAmps. This was repeatable using several different approaches.
That is, until I turned the cabin lights on and off one time and the current went to zero. Is it possible the cabin lights could be drawing current with the lights off?
Gary
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