Free 7 Day Trial RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-07-2006, 08:40 AM   #1
2 Rivet Member
 
Join Date: Aug 2005
Posts: 52
battery isolator/relay

I am not sure these are one in the same so I need a little help. THere is a relay that is supposed to connect the house batteriers with the coach battery when the starter is energized. I say supposed to but in our case this is not happening. The relay is located, on our coach, behind the pull out battery locker, mounted on the coach frame.

It does not have a part number on it but has (if I remember correctly) 3 poles. Does anyone know the replacement part number?

This does not look like it but I found it at PPL, Will it work?

Thanks
Honkity Hank is offline   Reply With Quote
Old 05-07-2006, 08:52 AM   #2
Rivet Master
Commercial Member
 
Vintage Kin Owner
Naples , Florida
Join Date: Dec 2005
Posts: 7,449
Hank,

Isolators come in a lot if different amp ratings. You need to know the output of your alternator and match one to that. Here is a list of the NOCO brand that you are seeking:

Delcotron:
90 amp.......IGD-90-CS
120 amp......IGD-120-B
200 amp......IGD-200-B

Standard :
90 amp........IGD-90HP
140 amp.......IGD-140HP
200 amp.......IGD-200HP
270 amp.......IGD-270HP

Prices range from $50 up to $127.

If you have 3 posts on the isolator, it might be a SurePower brand. They range from 70-160 amps and cost between $40-95
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
lewster is offline   Reply With Quote
Old 05-07-2006, 08:59 AM   #3
Rivet Master
 
ALANSD's Avatar

 
1966 26' Overlander
Woodstock , Georgia
Join Date: Feb 2002
Posts: 8,524
and once you pick the right size, the brand name is just a personal choice. I have a 200 rated on mine with a 135 amp alt.
__________________
1966 overlander..sold
AIR #005
Please visit our blogs and web pages:
OUR AIRSTREAM PASSION! BLOG
RESTORING AN AIRSTREAM
retired!
ALANSD is offline   Reply With Quote
Old 05-07-2006, 02:24 PM   #4
2 Rivet Member
 
shelocta's Avatar
 
1990 25' Excella
Pflugerville , Texas
Join Date: Aug 2002
Posts: 72
Depends?

I have an '83 310 MH and the strater boost relay is tied to the start swith. But I think on most models there is a switch or button in the glove box so you can use it when the engine bater is low. Of the 3 wires on your relay, if 12 volts is applied to the terminal with the small wire you should here the relay snap closed.
Good Luck
Bill & Kat
__________________
Give me 40 acres and I'll turn this rig around.
shelocta is offline   Reply With Quote
Old 05-07-2006, 03:46 PM   #5
Rivet Master
 
guy99's Avatar
 
1984 31' Airstream310
Dunsmuir , California
Join Date: May 2004
Posts: 1,336
Images: 16
Hank,
Be careful! The relay which connects your house battery to your chassis battery is usually controlled by a switch as Bill said.

This functionality is NOT the same as your battery isolator which keeps your house and chassis batteries separate EXCEPT when the engine (alternator) is running. This is done so that you do not discharge your chassis batteries while camping without external power. The last thing you want is to have dead batteries and no way to start your engine.
__________________
If you want others to be happy, practice compassion.
If you want to be happy, practice compassion - The Dalai Lama

1984 310 Limited Motorhome
Courtesy Parking (W/S/E/Wi-Fi) on I-5 in Northern California, 70 miles from Oregon border
guy99 is offline   Reply With Quote
Old 05-18-2006, 04:23 AM   #6
4 Rivet Member
 
Chuckles's Avatar
 
1983 31' Airstream310
Iwerne Minster , Dorset. UK
Join Date: Aug 2005
Posts: 274
There is an alternative....

I have fitted the Sterling Battery-to-Battery Charger.

It acts as an isolator, Diode and boosts charge to the coach batteries.
Check out www.sterling-power.com

Chuck
Chuckles is offline   Reply With Quote
Old 05-18-2006, 09:19 AM   #7
Rivet Master
 
arodriguez60's Avatar
 
2008 27' Classic FB
1959 22' Flying Cloud
fairview , New Mexico
Join Date: Mar 2005
Posts: 575
Images: 85
What yuo are looking for is a continuos duty silenoid. Works like a ford silenoid. It connects the house battery(s) to the starter battery while starting the vehicle. You should be able to buy one at Napa or carqwest autoparts store. Ford also used them instead of an isolater on their camper specials. Do not use that isolater that you show in the picture. It uses diodes as a one way doorway for electricity and cannot handle the amperage that the starter will use and will burnup instantly.
arodriguez60 is offline   Reply With Quote
Old 06-06-2006, 01:07 PM   #8
3 Rivet Member
 
Join Date: Jun 2002
Posts: 114
Quote:
Originally Posted by Honkity Hank
I am not sure these are one in the same so I need a little help. THere is a relay that is supposed to connect the house batteriers with the coach battery when the starter is energized. I say supposed to but in our case this is not happening. The relay is located, on our coach, behind the pull out battery locker, mounted on the coach frame.

It does not have a part number on it but has (if I remember correctly) 3 poles. Does anyone know the replacement part number?

This does not look like it but I found it at PPL, Will it work?

Thanks
From your Post it is not clear what you want to do.
1. There is an emergency start circuit that uses a momentary contact switch in the glove box to hook all of the batteries together. This allows easy starting with a weak coach battery. Their is a relay near the batteries which does the connection.
2. The battery isolator allows both the house and coach start battery to be charged when the engine is running. That is the picture you have shown. This only works when the engine is running.
3. When you are connected to 110AC you are only charging the House batteries and not the starter battery.

So which is not working or what do you want to do?
Howard Lefkowitz is offline   Reply With Quote
Old 06-08-2006, 07:00 PM   #9
2 Rivet Member
 
Join Date: Aug 2005
Posts: 52
Quote:
Originally Posted by Howard Lefkowitz
From your Post it is not clear what you want to do.
1. There is an emergency start circuit that uses a momentary contact switch in the glove box to hook all of the batteries together. This allows easy starting with a weak coach battery. Their is a relay near the batteries which does the connection.
2. The battery isolator allows both the house and coach start battery to be charged when the engine is running. That is the picture you have shown. This only works when the engine is running.
3. When you are connected to 110AC you are only charging the House batteries and not the starter battery.

So which is not working or what do you want to do?
I replaced the relay near the batteries, I think that was not working properly. I am not sure where the momentary contact switch is that you say is in the glove box. Is that a manual switch or automatic?

Thank for the insight on the isolator, I think it is working properly.

Jeff
Honkity Hank is offline   Reply With Quote
Old 06-08-2006, 10:28 PM   #10
3 Rivet Member
 
Join Date: Jun 2002
Posts: 114
It is a manual switch and is usually located on the top of the glove box (It hangs down into the box). When you pull it on it energizes the relay and connects the coach batteries to the engine battery. This gives you extra starting power. It is strictly for emergency starting which is why it is spring loaded to turn off when you release it.
Howard Lefkowitz is offline   Reply With Quote
Old 12-17-2007, 11:12 PM   #11
1 Rivet Member
 
Join Date: Oct 2004
Posts: 8
The photo looks like a rectifier isolator rather than a relay. Lyall
Lyall is offline   Reply With Quote
Old 11-18-2010, 10:00 AM   #12
1 Rivet Member
 
Join Date: Oct 2004
Posts: 8
I have a relay on my 1995 Ford. The one I first put in was from RadioShack and burned out after a dozen years. I bought some Bosch 12 volt relays from B. G. Micro and the sockets for them. I wired them in and they work fine. You need a 12 volt relary with about 30 amp contacts. Lyall
Lyall is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery Location uwe 1970-79 Tradewind 23 12-02-2015 08:41 AM
Battery Slide Out niftypkg Electrical - Systems, Generators, Batteries & Solar 5 01-01-2003 04:41 PM
Battery Dead - Again & Again eraffety Airstream Motorhome Forums 10 11-02-2002 12:03 AM
igniton switch and the mystery of the dead battery Curtis-79MH Airstream Motorhome Forums 3 10-25-2002 03:58 PM
Battery Level Display uwe Electrical - Systems, Generators, Batteries & Solar 4 07-04-2002 08:31 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 09:44 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.