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Re: Europa-List: Re: Oil Pressure Switch for engine hourmeter

Subject: Re: Europa-List: Re: Oil Pressure Switch for engine hourmeter
From: Rowland Carson <rowil@clara.net>
Date: Wed, 20 Jan 2010 10:16:07

>On 01/18/2010 09:25 PM, Rowland Carson wrote:
>
>  > The diagram calls out a 30A slo-blo fuse to protect the 12AWG wire
>>  leaving the C, R, +B terminals. However, there is NO protection for the
>>  20AWG wire leaving the same spot and going through the firewall to the
>>  alternator warning lamp.
>
>No, because you are supposed to connect it behind the fuse. The 12AWG
>wire is connected to the C terminal, so instead of connecting the lamp
>to the C terminal directly, you could as well use the other end of the
>12AWG wire. 12 Volts is 12 Volts after all. ;-) In fact, any 12 V line
>would serve the same purpose.
>You should indeed not connect any unfused wire to the C,R or B terminals

Frans - I agree with your last sentence completely, but here is what 
the diagram I've got shows:


I don't usually paste graphics into my e-mails so am not sure if this 
will get through to the list unmangled.

If the graphic is not visible in this e-mail, you can see a copy of it at:

http://home.clara.net/rowil/grafix/alt_warn.gif

You can see that the wire to the starter warning light does have a 
fuse, so why not the wire to the alterntor warning light?

I think Mike Gregory was involved in the last modification of the 
diagram in the manual. Mike, if you're listening, have you any 
comments?

I postulated 2 scenarios for what happens at the L terminal of the 
regulator when all is well (open-circuit or +12V) and am still not 
sure which is correct. Either will of course serve to supply the 
engine timer through the warning light, but if L is held at +12V, I 
feel the lead from it should also be fused.

Maybe someone who's taken apart one these regulators might know what 
potentials should appear at the L terminal.

regards

Rowland
-- 
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