| [GMCnet] Need some Help [message #347454] |
Fri, 06 September 2019 23:21  |
DennyR
Messages: 7
Registered: December 2011
Karma: 0
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Junior Member |
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I am traveling the Lincoln Highway commemorating the 1919 Military
Convoy.Currently in Iowa heading West.
I have lost all power to the dash
I can start the unit using the batt boost.
Take the boost off and she runs fine.All dash controls and gauges as
well as lights work fine till I shut down.Then nothing No dash, no
lights, nothing that operates from the dash.
I am assuming i blew something in the isolation network???
Any help much appreciated.
Denny Robish
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| Re: [GMCnet] Need some Help [message #347456 is a reply to message #347454] |
Sat, 07 September 2019 00:13  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Your are running off of the alternator and that is OK and normal, You are NOT starting off of the engine battery. You can start in Boost off or the house Battery(s). So I believe your problem is with the engine battery cables or the engine battery is open (Shot). I would clean and check both engine battery cables first. I doubt it is the battery, but it could be.
The alternator, isolator, and fusible link are all OK or it would not run down the road.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Need some Help [message #347458 is a reply to message #347456] |
Sat, 07 September 2019 06:51 |
6cuda6
Messages: 975
Registered: June 2019
Karma: -6
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Senior Member |
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Sounds like a bad engine battery or maybe an open isolater diode.....as Ken mentioned, check all your battery connections then, if possible, have the battery tested.
Because both of my batteries are side by side in the engine compartment i was able to cheat and just swap the connectors to verify my issue with batteries.
Rich Mondor,
Brockville, ON
77 Hughes 2600
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| Re: [GMCnet] Need some Help [message #347472 is a reply to message #347458] |
Sat, 07 September 2019 11:15 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Visual inspection is one thing we all eed to do to avoid lot of issues we
face.
I am surprised at all the units that come into our shop for repair for
something that is unrelated, and we see so much neglected items.
I should not ridicule people,as I am guilty by saying "its ok for now" and
it fails later and I'm all upset.
So ; DO AS I SAY, NOT AS I DO !!!!!
On Sat, Sep 7, 2019 at 4:52 AM tonka6cuda6--- via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Sounds like a bad engine battery or maybe an open isolater diode.....as
> Ken mentioned, check all your battery connections then, if possible, have
> the
> battery tested.
>
> Because both of my batteries are side by side in the engine compartment i
> was able to cheat and just swap the connectors to verify my issue with
> batteries.
> --
> Rich Mondor,
>
> Brockville, ON
>
> 77 Hughes 2600
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Need some Help [message #347478 is a reply to message #347454] |
Sat, 07 September 2019 13:12 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Check battery cables means remove and clean the battery cable ends. I mean really clean, not just look at them. I am going to disagree with the isolator because the alternator is supplying power to the engine side when running and that circuit is through the isolator.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Need some Help [message #347657 is a reply to message #347454] |
Tue, 10 September 2019 23:29 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Thanks guys.I checked the engine battery and found it to be bad.only
had 9 volts.
replaced and all seems to be fine.
-----------------------------------------From: "Ken Burton via
Gmclist"
To: gmclist@list.gmcnet.org
Cc: "Ken Burton"
Sent: Saturday September 7 2019 2:12:37PM
Subject: Re: [GMCnet] Need some Help
Check battery cables means remove and clean the battery cable ends. I
mean really clean, not just look at them. I am going to disagree with
the
isolator because the alternator is supplying power to the engine side
when running and that circuit is through the isolator.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Need some Help [message #347666 is a reply to message #347454] |
Wed, 11 September 2019 09:50 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Ant, put your meter on the chassis battery side of the isolator and ensure that the voltage rises when you crank the engine and it's running, to preclude an open isolator diode - not at all common but possible.
(At this point, I haul out the ammeter dead horse and beat it again)
--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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