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1. 07:18 AM - Re: Need help with diode across battery and starter relays (Jerry Latimer)
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| Subject: | Need help with diode across battery and starter relays |
John,
You might want to join the aeroelectric forum. This is the type of question
that is answered by the gurus on the forum.
Anyway here is a link to photo on aeroelectric.om that shows the starter
contactor and how it is wired.
http://www.aeroelectric.com/Pictures/Contactors/s701-1.jpg
Hope this helps.
Jerry Latimer
CH601HDS
N316JL
200 hours and having the time of my life.
-----Original Message-----
From: owner-zenith601-list-server@matronics.com
[mailto:owner-zenith601-list-server@matronics.com] On Behalf Of w8n2bup
Sent: Tuesday, January 01, 2013 7:30 PM
Subject: Zenith601-List: Need help with diode across battery and starter
relays
--> <johnrich987@hotmail.com>
After a lot of Googling, I thoroughly understand the reason for the diode
but I am hoping that someone can give me the exact placement of a diode for
both the battery and the starter contactors (relays) in my Jabiru 3300.
First the battery contactor. I have a large post going to the battery, a
small post going to the master switch, and a second large post going to the
starter relay and elsewhere. When I put my voltmeter on the battery post, I
have my 12 volts. When I put it on the small post, I was surprised to find
voltage there, too, with the master off. When I flip the master switch
on.,, it mostly goes away on the small post. In any case, the best I can
figure is to put the cathode (stripe end) on the large post going to the
battery and the anode on the small post. I was thrown a bit by some net
comments saying it goes "across" the relay. Other comments showed it going
to ground. On top of it all, my firewall kit came with a diode made with
the cathode (band end!
) going to a small ring connector and the anode going to a large ring.
Seems backward. Maybe someone accidentally reversed it? Now the starter
relay. It has a few extra large spade connectors and posts. When I put my
meter on diode setting, there appears to be a diode built into the relay.
With no markings on the relay, I can't look it up to know for sure. I guess
it wouldn't hurt to add a diode anyway with the cathode pointing to the
battery relay and the anode going to the small starter switch wire post?
Just hoping someone knows exactly what I have and how to connect the diode
or diodes. If easier, please call me evenings at (913) 915-1989. Still
W8N2BUP, John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=391362#391362
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