Home » Public Forums » GMCnet » [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power
| [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283460] |
Wed, 29 July 2015 13:17  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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Peer,
It has been years since I looked at an old buzz box but I don’t remember ever seeing one with a fused distribution panel inside. The ones I remember just had a battery + and - and a ground on the DC side and a standard AC plug for input. The purpose was to both supply 12vdc power to the house (the converter function) and to charge the batteries. Your photo appears to show some kind of a different box that does have a fused distribution panel inside and another fused distribution panel beside it. It could be some other type of converter/battery charger or simply one that I have never seen before. Take it out all together on both the AC and DC sides.
To install the Inteli-power unit I suggest you simply run a wire (sized for the amp output of that Inteli-power unit) directly to the + and - side of the battery. That will take care of the battery charging function. Then run an 8 gage wire from the battery + and another from the battery - to your house fused distribution panel (where ever it is located). That will take care of the converter function.
You will need to chase down where the wires come from and go to in the units in your photos. The yellow wire probably is a ground wire. The black wire looks like it could be coming from a battery + source (wrong color for that) and powering the fused distribution panel but it appears to be on the wrong side to do that. From the pic I can’t tell what the red wire is supposed to do. That said, don’t guess at the function of these wires or the box pictured or the fused distribution panel beside that box. Trace all those wires so you are sure of function before using them or plugging in the Inteli-power unit.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
glwork@mac.com
http://jerrywork.com
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Message: 9
Date: Wed, 29 Jul 2015 11:17:34 -0400
From: Peer Oliver Schmidt
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Verification - Three cables from buzz box, only
two connectors at Inteli-power
Message-ID:
Content-Type: text/plain; charset=windows-1252
I knew I should have posted a pic to explain what I meant :)
http://www.gmcmhphotos.com/photos/buzz-box-replacement/p58797-buzz-box.html
There is a black, a red and a yellow cable leaving the buzz box on the
12v afaict.
The yellow is probably ground.
The black is connected to BAT
The red is connected to a fuse box next to the buzz box.
My Inteli-Power has plus and minus only on the 12v side.
--
Best regards
Peer Oliver Schmidt
the internet company
PGP Key ID: 0x83E1C2EA
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283467 is a reply to message #283460] |
Wed, 29 July 2015 14:13  |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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From your 3 pictures, and what I can make out of the label, it appears the:
- Black wire goes to your battery Positive (+)
- Red wire is going to your external fuse panel
- Yellow wire is case ground so I'm guessing it is DC ground negative (-)
I can make out from the label that there is a relay that disconnects the battery from the fuse panel when the converter is plugged in. This converter must have some battery charging "smarts" as they want the battery to be "unloaded" while charging so the charger can read the battery voltage and current while charging. It is not the standard GMC "buzz box"
When you unplug your converter, the relay connects the battery to the fuse panel to supply power.
Just what I can see from your photos and read from the labels. If I was there, I would be using my Volt-Ohm meter to confirm that.
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283476 is a reply to message #283460] |
Wed, 29 July 2015 16:15 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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My Norris upfit 23 is identical to Chuck Boyd's, even to the color of the Dymo labels. It has a Tripp-Lite fitted which I believe to be original. Fuse panel is behind a door on the end of the supply. It also looks to have a ferro-resonent transformer to regulate the voltage. (Often referred to as a
Sola Constant Volt),
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283504 is a reply to message #283461] |
Thu, 30 July 2015 00:23 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Peer Oliver Schmidt wrote on Wed, 29 July 2015 11:29And added another one, which shows the labeling. Seems to be a 1982 unit.
http://www.gmcmhphotos.com/photos/buzz-box-replacement/p58806-buzz-box-labels.html
--
Best regards
Peer Oliver Schmidt
the internet company
PGP Key ID: 0x83E1C2EA
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From what I can see on the cover the unit you have switches from the coach battery power to rectified converter power by way of a relay when 120 volt ac is supplied to the unit. This was pretty common back in the early 70's. They isolated the battery and just powered the 12 volts from the converter . This is not a good way to power the coach as it is not a pure d c supply it will play havoc on your 12 volt electronics. You will need to take the thing out physically identity the negative wire and the wire that goes to your battery then you will need to remove the fuse board and connect the common hot side to the hot battery wire or wire in a new fuse panel . Your new converter wasn't ment to be isolated from the battery when it is energized and you wouldn't want it to be.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283505 is a reply to message #283504] |
Thu, 30 July 2015 00:39 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
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roy1 wrote on Wed, 29 July 2015 22:23Peer Oliver Schmidt wrote on Wed, 29 July 2015 11:29And added another one, which shows the labeling. Seems to be a 1982 unit.
http://www.gmcmhphotos.com/photos/buzz-box-replacement/p58806-buzz-box-labels.html
--
Best regards
Peer Oliver Schmidt
the internet company
PGP Key ID: 0x83E1C2EA
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From what I can see on the cover the unit you have switches from the coach battery power to rectified converter power by way of a relay when 120 volt ac is supplied to the unit. This was pretty common back in the early 70's. They isolated the battery and just powered the 12 volts from the converter . This is not a good way to power the coach as it is not a pure d c supply it will play havoc on your 12 volt electronics. You will need to take the thing out physically identity the negative wire and the wire that goes to your battery then you will need to remove the fuse board and connect the common hot side to the hot battery wire or wire in a new fuse panel . Your new converter wasn't ment to be isolated from the battery when it is energized and you wouldn't want it to be.
On second thought you don't need any of those fuses . The red and black wire will Tie together. The yellow is likely connected to negative did you measure the voltage from the black to the yellow to confirm it is the negative?
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283514 is a reply to message #283499] |
Thu, 30 July 2015 06:25 |
Olly Schmidt
Messages: 1265
Registered: February 2014
Location: Germany and Scottsville, ...
Karma: 8
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Terry,
> Would really like to help you hook up your new setup in person, any
> chance of you touring this area? Wife kinda balked at going to
> Maryland...but I still want to go.
thank you very much for your offer. Unfortunately, my GMC is currently
without registration, and the lady from the DMV only wants to register
it, when I have a title in my hands, which the seller lost. I do have
the registration card, which according to the DMV website should be
sufficient for out-of-state vehicles, but still no go. Contacted the
seller, to see if they can get a replacement title to me. Until then, no
driving around.
Whatever kind of resistor you need, I'll gladly take out of the box. The
box has been working okayish, but I assume the install itself wasn't
done properly, because I get flickering lights whenever the water pump
starts. I assume, as Jerry has hinted, the cables aren't up to the task.
--
Best regards
Peer Oliver Schmidt
the internet company
PGP Key ID: 0x83E1C2EA
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Best regards
Olly Schmidt
PGP Key ID: 0x18a9 3a1f 4196 bf22
'76a Eleganza II, VA
'73 Sequoia, SH, Germany
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283525 is a reply to message #283462] |
Thu, 30 July 2015 08:55 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
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OK, the LED (only recently upgraded) over my head just powered up.....
Peer,
You don't have that relay, the tag is wrong...
(The terminal is even missing from the panel.)
I fought with one of these that was mis-installed about an hundred years (give or take a decade) ago.
Please Notice that the diagram does not match the facts. There is supposed to be a separated terminal for the battery.
These units came from Tripplite or Consta-volt, and they had originally had two DC power supplies inside.
One was a very limited ferro-resonant contant voltage for the house systems.
The other was an un-smoothed (actually half-wave iirc) supply for charging the house bank.
At the time it was believed that the best power for charging flooded batteries was one with lots of ripple.
But this is a little bit later unit.
The ripple thing proved to be wrong and the silicon (as opposed to selenium) rectifiers became cost effective for the whole unit.
These units were all constant voltage, but it was high enough to charge the batteries was also high enough to ruin the batteries.
The next thing that is throwing some of us off is the color coding as it goes against convention.
I think it was Jerry, but someone above was correct.
Both the black and red are positive and should go to the positive on the new replacement.
The yellow is house ground and should go the new negative.
If I lost anybody, come back and I will try again.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283553 is a reply to message #283525] |
Thu, 30 July 2015 16:31 |
Olly Schmidt
Messages: 1265
Registered: February 2014
Location: Germany and Scottsville, ...
Karma: 8
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Matt,
thanks for taking the plunge and making a statement :D
I love it when people go ahead and take the stick in their hand and show
the way. I shall do what you propose and see what happens. I am positive
things will be okay. Also, I might go ahead, and replace the cables with
something a bit thicker.
Thank again everyone, you are one hell of a helpful bunch.
Terry,
send me an email with your address and what exactly you need from the box.
--
Best regards
Peer Oliver Schmidt
the internet company
PGP Key ID: 0x83E1C2EA
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Best regards
Olly Schmidt
PGP Key ID: 0x18a9 3a1f 4196 bf22
'76a Eleganza II, VA
'73 Sequoia, SH, Germany
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283629 is a reply to message #283625] |
Fri, 31 July 2015 19:58 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Jared, I think that somehow I'm going to convince my wife to go with me or I may just go for it solo. Did all the driving to Bean Station anyway, and that's about twice as far. All I need now is lotsa luck and the location to get there.
Peer, thank you for the offer, and I will go out and get a picture of the part(s) I need and send it to you in a PM in a later tonight. Right now I need your good fortune with pumps! After putting the rear bed back together in our GMC, I decided to cool off in the pool. Then I discovered the pool pump binding and not pumping full volume. Took it apart to find that a mud dauber had invaded and got caught up in the seal, and trashed it out. So, somebody had to replace a pump today for $150.00  ...I'm glad yours was just a fuse! Kinda coincidental, huh?
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| Re: [GMCnet] Verification - Three cables from buzz box, only two connectors at Inteli-power [message #283634 is a reply to message #283629] |
Fri, 31 July 2015 21:28 |
werewilfs
Messages: 329
Registered: July 2012
Location: Rappahannock County, VA
Karma: 0
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Terry,
Montgomery College, Lot 2, 51 Mannakee Street, Rockville, Maryland 20850
Aug 8th 9:00 am to 3:00 pm
These guys love us there. (Can you believe that last year was the first year they have ever had a GMC motorhome at the 40th annual All GM show? and they got 4 of them there!)
And there's not a more fun way to get publicity for our beasts than these car shows. I wouldn't want to do this every weekend but it's fun to do once a year.
Jared & Stefanie Kohl
Rappahannock County, VA
1973 Painted Desert "Onslow"
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