Hi Alan,
Im no expert & would confine my testing to ground based. Find someone with basic
electrical knowledge or ask your inspector.
You can measure current drawn from the battery with a clamp meter like this for
less that 30 quid
https://www.amazon.co.uk/Digital-Voltage-Resistance-Frequency-Multimeter/dp/B016D7UEHW/ref=sr_1_8?ie=UTF8&qid=1472893638&sr=8-8&keywords=clamp+meter+dc+current
Clip that over the either battery cable then see how much current your master
solenoid
takes, try with the solenoid switched on & then switched off but bypassed
with a fat wire or jump lead.
What ever is drawing power should be getting warm.
Stay clear of the prop.
Dont go outside your competence zone as electrical errors can be expensive.
Good luck,
Roger.
> On 3 Sep 2016, at 09:04, Alan Carter <alancarteresq@onetel.net> wrote:
>
>
> Hello All.
>
> I have had this problem for sometime now, probably posted it here about a year
ago.
> However something is stealing my electricity, my voltmeter really indicates
> above
12 volts and the battery is all the time being very slowly drained over the
course of time.
>
> Just to keep the problem simple,
> Flying 12v indicated, turn the Avionics Master Switch OFF, voltmeter shows say
12.5 volts , pull about every CB ( 914 so not the Fuel pump, but your could
do it momentary if you wanted to)
> So at about this point nearly all the power to the components is OFF
>
> We have the engine modules and a couple of other things live,, but 99% is now
OFF and still showing about 12 volts with practical every thing isolated ie OFF.
Except the Mater Switch, PS I am not a builder,
>
> Now turn the Master Switch OFF, and Hay Presto voltmeter jumps to 14 volts,
> now
charging the battery nicely.
>
> Fitted, New Battery, New Regulator/Rectifier, Volt meter on the brown cables
to the Rectifier 14volts so no problem with Dynamo/Alt output.
>
> Master Switch ON, clunk Master Switch OFF click,
> Some relay, or starting circuit, When you put the Master ON clunk, is they
> some
component staying engaged stealing my power when it should have dropped off
line after engine staring ,
> Hence when you switch the Master Switch OFF with the engine running, this
> click
drops something off line which should have automatically dropped off line
but with Master Off is the only to stop power getting to it,so making it drop
off line manually.
> Hence then you get the 14 volts showing.
>
> Any thoughts on this,
> Or a place I can take it to get it fixed,
>
>
> Regards.
> Alan
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=460217#460217
>
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