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Engine battery charge [message #261700]

Fri, 12 September 2014 15:20

lance

Messages: 190
Registered: December 2004
Location: Vancouver, WA

Karma: 0

Senior Member

I seem to remember a way to keep the engine battery charged while in shore power but can't find it anywhere. Anyone know how to do this?

1974 Palm Beach

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Re: Engine battery charge [message #261710 is a reply to message #261700]

Fri, 12 September 2014 17:14

lotsofspareparts

Messages: 726
Registered: May 2014
Location: Arlington, WA

Karma: -9

Senior Member

lance wrote on Fri, 12 September 2014 13:20

I seem to remember a way to keep the engine battery charged while in shore power but can't find it anywhere. Anyone know how to do this?

http://i287.photobucket.com/albums/ll159/lotsofspareparts/1977%20GMC%20Eleganza/IMG_20140823_095611_359.jpg

Here is what I did, clamp with cable from the Coach battery side of the Boost Relay, I can disconnect and store here (photo below) when not in use. I also strategically made the cable short enough so that if the clamp were to fall from its storage spot it can not contact a ground.

http://i287.photobucket.com/albums/ll159/lotsofspareparts/1977%20GMC%20Eleganza/IMG_20140823_095558_599.jpg

Hope this helps, Jared

Jared & Tina Lazaron + 14yr old Daughter..... 77 Eleganza II "Recherché"..... 73 Canyon Lands 230 "Elephant"

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Re: Engine battery charge [message #261712 is a reply to message #261700]

Fri, 12 September 2014 17:24

habbyguy

Messages: 896
Registered: May 2012
Location: Mesa, AZ

Karma: 3

Senior Member

Jared's idea is a good one. I don't need to do that because my boost switch is a locking one (so all I need to do is to leave the switch in the boost position when I'm on shore power).

Mark Hickey Mesa, AZ 1978 Royale Center Kitchen

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Re: [GMCnet] Engine battery charge [message #261714 is a reply to message #261700]

Fri, 12 September 2014 17:21

Ray Erspamer

Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin

Karma: -3

Senior Member

This is what I use.

http://www.yandina.com/c100InfoR3.htm

On Fri, Sep 12, 2014 at 3:21 PM, Lance wrote:
> I seem to remember a way to keep the engine battery charged while in shore power but can't find it anywhere. Anyone know how to do this?
> --
> 1974 Palm Beach
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

--
Ray Erspamer
78 Royale - "The Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMCRoyale@gmail.com
414-484-9431
Web Site: http://ray-lisa.page.tl/
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Ray Erspamer 78 GMC Royale Center Kitchen 403, 3.70 Final Drive Holley Sniper Quadrajet EFI System, Holley Hyperspark Ignition System 414-484-9431

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Re: [GMCnet] Engine battery charge [message #261715 is a reply to message #261714]

Fri, 12 September 2014 17:47

lotsofspareparts

Messages: 726
Registered: May 2014
Location: Arlington, WA

Karma: -9

Senior Member

Ray Erspamer wrote on Fri, 12 September 2014 15:21

This is what I use.

http://www.yandina.com/c100InfoR3.htm

On Fri, Sep 12, 2014 at 3:21 PM, Lance wrote:
> I seem to remember a way to keep the engine battery charged while in shore power but can't find it anywhere. Anyone know how to do this?
> --
> 1974 Palm Beach
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

--
Ray Erspamer
78 Royale - "The Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMCRoyale@gmail.com
414-484-9431
Web Site: http://ray-lisa.page.tl/
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WOW Ray, quite a price tag on that...... I do like the description in the link, Does yours replace the factory battery isolator altogether? Seems as though it does the same thing the converter could do though when plugged into shore power using the method I use.

I just cut the clamp off of a 100 amp battery charger we had at work that decided to take a dump.

Not certain if my battery isolator works as it was disconnected when I bought the coach. I basically use this clamp to keep the engine battery charged while I am listening to the radio.

Jared

Jared & Tina Lazaron + 14yr old Daughter..... 77 Eleganza II "Recherché"..... 73 Canyon Lands 230 "Elephant"

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Re: [GMCnet] Engine battery charge [message #261721 is a reply to message #261700]

Fri, 12 September 2014 18:41

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

On Friday, September 12, 2014, Lance wrote:

> I seem to remember a way to keep the engine battery charged while in shore
> power but can't find it anywhere. Anyone know how to do this?

Do it this way

http://www.gmcmhphotos.com/photos/combiner-to-diode-isolator/p26973-10-minute-combiner-install.html

Bk lost switch bad on so many levels
Read all the slides
Erf

> --
> 1974 Palm Beach
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--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] Engine battery charge [message #261722 is a reply to message #261714]

Fri, 12 September 2014 18:44

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

Boost switch. Is not the way
Erf

On Friday, September 12, 2014, gene Fisher wrote:

>
>
> On Friday, September 12, 2014, Lance > wrote:
>
>> I seem to remember a way to keep the engine battery charged while in
>> shore power but can't find it anywhere. Anyone know how to do this?
>
> Do it this way
>
> http://www.gmcmhphotos.com/photos/combiner-to-diode-isolator/p26973-10-minute-combiner-install.html
>
> Bk lost switch bad on so many levels
> Read all the slides
> Erf
>
>> --
>> 1974 Palm Beach
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
>

--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] Engine battery charge [message #261725 is a reply to message #261722]

Fri, 12 September 2014 19:05

tphipps

Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL

Karma: 9

Senior Member

If you have one of the "free" Harbor Freight multi-meters or a real one, checking the isolator is easy. Disconnect the wires from the isolator ( hint, label or photograph wires), set it on diode checker.
One lead to alternator input, touch lead to either output posts, if it makes noise, that side is good. Get noise from both sides, the isolator is good. No noise, switch leads before you give up.
Gene's combiner across isolator is the easy way to go.
Tom, MS II

2012 Phoenix Cruiser model 2552 KA4CSG

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Re: [GMCnet] Engine battery charge [message #261727 is a reply to message #261725]

Fri, 12 September 2014 19:25

lotsofspareparts

Messages: 726
Registered: May 2014
Location: Arlington, WA

Karma: -9

Senior Member

tphipps wrote on Fri, 12 September 2014 17:05

If you have one of the "free" Harbor Freight multi-meters or a real one, checking the isolator is easy. Disconnect the wires from the isolator ( hint, label or photograph wires), set it on diode checker.
One lead to alternator input, touch lead to either output posts, if it makes noise, that side is good. Get noise from both sides, the isolator is good. No noise, switch leads before you give up.
Gene's combiner across isolator is the easy way to go.
Tom, MS II

I have 2 Crafstman multimeters, one at work and one at home, what is the symbol for a diode?

Jared

Jared & Tina Lazaron + 14yr old Daughter..... 77 Eleganza II "Recherché"..... 73 Canyon Lands 230 "Elephant"

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Re: [GMCnet] Engine battery charge [message #261730 is a reply to message #261727]

Fri, 12 September 2014 19:37

A Hamilto

Messages: 4508
Registered: April 2011

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lotsofspareparts wrote on Fri, 12 September 2014 19:25

I have 2 Crafstman multimeters, one at work and one at home, what is the symbol for a diode?
Jared

http://en.wikipedia.org/wiki/Diode#Electronic_symbols

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Re: [GMCnet] Engine battery charge [message #261731 is a reply to message #261730]

Fri, 12 September 2014 19:47

lotsofspareparts

Messages: 726
Registered: May 2014
Location: Arlington, WA

Karma: -9

Senior Member

A Hamilto wrote on Fri, 12 September 2014 17:37

lotsofspareparts wrote on Fri, 12 September 2014 19:25
I have 2 Crafstman multimeters, one at work and one at home, what is the symbol for a diode?
Jared
http://en.wikipedia.org/wiki/Diode#Electronic_symbols

You could have simply said "check for continuity"

Jared

Jared & Tina Lazaron + 14yr old Daughter..... 77 Eleganza II "Recherché"..... 73 Canyon Lands 230 "Elephant"

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Re: [GMCnet] Engine battery charge [message #261737 is a reply to message #261731]

Fri, 12 September 2014 21:29

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

On Fri, Sep 12, 2014 at 5:47 PM, Jared wrote:

> A Hamilto wrote on Fri, 12 September 2014 17:37
>> lotsofspareparts wrote on Fri, 12 September 2014 19:25
>>> I have 2 Crafstman multimeters, one at work and one at home, what is
> the symbol for a diode?
>>> Jared
>> http://en.wikipedia.org/wiki/Diode#Electronic_symbols
>
>
> You could have simply said "check for continuity"
> or do this
>
http://www.gmcmhphotos.com/photos/data/15/GMC_charging_system_checkout.pdf

or this
http://gmc49ers.blogspot.com/2014/03/check-your-battery-system-through-your.html

erf

>
>
> Jared
>
> --
> Jared & Tina Lazaron + 7yr old Daughter.
>
> 77 Eleganza II "Recherché" Winterfeldt 455, Holley ProJection, Doug
> Thorley Headers, 3in exhaust, Switch Pitch, Alcoas, ONAN 6.5 Emerald
> series, CMC
> Restoration
>
> GO SEAHAWKS!!
>
> Arlington, WA 98223
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] Engine battery charge [message #261752 is a reply to message #261722]

Sat, 13 September 2014 09:29

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

Mr ERFisher wrote on Fri, 12 September 2014 19:44

Boost switch. Is not the way
Erf

Eugene,

Why No - Pray tell???
It works for me and is DC3 dependable.

(I replaced my eleventh combiner on an owner's boat last week.)

Matt - in Council Bluffs this morning

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: Engine battery charge [message #261859 is a reply to message #261700]

Sun, 14 September 2014 13:25

Bob de Kruyff

Messages: 4260
Registered: January 2004
Location: Chandler, AZ

Karma: 1

Senior Member

lance wrote on Fri, 12 September 2014 14:20

I seem to remember a way to keep the engine battery charged while in shore power but can't find it anywhere. Anyone know how to do this?

A simple jumper between the two 12v sides of the house and chassis battery will do the job for charging--just don't forget to remove it before starting. The boost switch energization works but does draw some current to keep it energized.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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Re: [GMCnet] Engine battery charge [message #261871 is a reply to message #261859]

Sun, 14 September 2014 14:38

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

This jumper also DISCHARGES Both batteries :)

Erf

On Sunday, September 14, 2014, Bob de Kruyff wrote:

> lance wrote on Fri, 12 September 2014 14:20
>> I seem to remember a way to keep the engine battery charged while in
> shore power but can't find it anywhere. Anyone know how to do this?
>
> A simple jumper between the two 12v sides of the house and chassis battery
> will do the job for charging--just don't forget to remove it before
> starting. The boost switch energization works but does draw some current
> to keep it energized.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Re: [GMCnet] Engine battery charge [message #261878 is a reply to message #261871]

Sun, 14 September 2014 16:28

lotsofspareparts

Messages: 726
Registered: May 2014
Location: Arlington, WA

Karma: -9

Senior Member

Mr ERFisher wrote on Sun, 14 September 2014 12:38

This jumper also DISCHARGES Both batteries

Erf

On Sunday, September 14, 2014, Bob de Kruyff wrote:

> lance wrote on Fri, 12 September 2014 14:20
>> I seem to remember a way to keep the engine battery charged while in
> shore power but can't find it anywhere. Anyone know how to do this?
>
> A simple jumper between the two 12v sides of the house and chassis battery
> will do the job for charging--just don't forget to remove it before
> starting. The boost switch energization works but does draw some current
> to keep it energized.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Gene Fisher -- 74-23,77PB/ore/ca
"Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
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The point of the thread was to explain how to keep coach and chassis batteries charged while plugged into shoe power. While being plugged into shore power I can't see how the batteries are "discharging"

Jared

Jared & Tina Lazaron + 14yr old Daughter..... 77 Eleganza II "Recherché"..... 73 Canyon Lands 230 "Elephant"

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Re: [GMCnet] Engine battery charge [message #261882 is a reply to message #261878]

Sun, 14 September 2014 17:46

midlf

Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)

Karma: 1

Senior Member

lotsofspareparts wrote on Sun, 14 September 2014 16:28

The point of the thread was to explain how to keep coach and chassis batteries charged while plugged into shoe power. While being plugged into shore power I can't see how the batteries are "discharging"

Jared

Correct - they cannot discharge while on shore power. However it is very easy to forget the jumper is on, Then later, when not on shore power, the two batteries can discharge together. Say when you are boon-docking. How anyone chooses to do this is up to them. For me, I can guarantee you I would forget to disconnect the jumper so I choose to use a combiner.

Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

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Re: Engine battery charge [message #261892 is a reply to message #261700]

Sun, 14 September 2014 19:30

lotsofspareparts

Messages: 726
Registered: May 2014
Location: Arlington, WA

Karma: -9

Senior Member

I have large black zip-tie that hangs on the rearview mirror, as soon as I attach the jumper I hang it. That way I will remember to disconnect the jumper. String around the finger kind of thing.

I got the idea from my travel trailer TV antenna, came with a placard (that says lower your antenna) to hang from the rearview mirror of the tow vehicle. Soon as we park the TT I reach up into the visor pocket and hang it. Reminds me to lower my antenna before heading home.

Works for me so far!!

Jared

Jared & Tina Lazaron + 14yr old Daughter..... 77 Eleganza II "Recherché"..... 73 Canyon Lands 230 "Elephant"

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Re: [GMCnet] Engine battery charge [message #261898 is a reply to message #261892]

Sun, 14 September 2014 20:03

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

On Sun, Sep 14, 2014 at 5:30 PM, Jared wrote:

> I have large black zip-tie that hangs on the rearview mirror, as soon as I
> attach the jumper I hang it. That way I will remember to disconnect the
> jumper. String around the finger kind of thing.
>
> I got the idea from my travel trailer TV antenna, came with a placard
> (that says lower your antenna) to hang from the rearview mirror of the tow
> vehicle. Soon as we park the TT I reach up into the visor pocket and hang
> it. Reminds me to lower my antenna before heading home.
>
> Works for me so far!!
>

good
gopherit
erf

>
> Jared
> --
> Jared & Tina Lazaron + 7yr old Daughter.
>
> 77 Eleganza II "Recherché" Winterfeldt 455, Holley ProJection, Doug
> Thorley Headers, 3in exhaust, Switch Pitch, Alcoas, ONAN 6.5 Emerald
> series, CMC
> Restoration
>
> GO SEAHAWKS!!
>
> Arlington, WA 98223
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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