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                           TeamGrumman-List Digest Archive
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                     Total Messages Posted Mon 12/14/09: 1
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Today's Message Index:
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     1. 07:28 PM - AG5B wiring question  (teamgrumman@AOL.COM)
 
 
 
________________________________  Message 1  _____________________________________


Time: 07:28:30 PM PST US
Subject: TeamGrumman-List: AG5B wiring question
From: teamgrumman@AOL.COM

I've got a 92 AG5B in my hangar for a new engine.  While at it, I decided
 to clean up the wiring.  I hate sloppy wiring.  This is one of those AGs
 with the grounds on the vacuum filter.  Go figure that one.  In the past,
 I've moved those grounds to the engine mount (the lug on the back).  I've
 done that to about 6 planes so far.  Never had a problem.  


While at the FWF restoration, I decided to change the battery & starter re
lays.  Funny thing is, I can't get the relays to work.  Rather than instal
ling them the way they came from the factory, I mounted them with the cap
 down as shown in the 'preferred mounting' diagram that came with the rela
ys.  Other than that, and the positive not going to big terminal marked "B
AT" on the battery relay (the diagram doesn't show that it matters, just
 need to use the big terminal,) everything is connected the way it came of
f the old relays.


Here is the setup:  
(1) No engine or engine mount.  
(2) Ground wire attached to the upper right (airframe) engine mount with
 an engine mount bolt. 
     - then attached to the neg side of the battery.  
(3) Power cable (positive) from battery to battery relay.
(4) Only 5 (or so) volts measured at the other engine mounts.
(5) Connected a separate ground to the bundle of grounds that went to the
 vacuum pump and now I get 24 (or so) volts at the other engine mounts. 
 It's almost as though the grounds in the cabin depend on the ground to th
e vacuum filter.  
(6) Still no action on the master (battery) relay.
(7) Ran a jumper from the negative side of the battery to the relay contac
t and the relay energizes . . .  except . . .  there is only 5 volts on th
e output side of the relay.  


I gave up for tonight.


I could really use a wiring diagram for this plane.  So far, the current
 flow logic isn't making sense.  Anyone know what the cannon plug code is?
  Back in the old days, I could read the number on the wire and look it up
.  All of these wires are covered with expando sleeve.  


Help.  Anyone.

 

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