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Old 09-26-2013, 09:13 AM   #1
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Part number Isalotor Relay

Hello, finally found the problem why the batteries were not chanrging on engine.

The isolator clicks but the parts inside do not connect.

I need the part number of the isolator. NAPA or anywhere else.

Here is a picture of the isolator.

Thanks.

Leaving for south on Nov 2nd !
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Nights camped in: 2014-96, 2015-139, 2016-89
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Old 09-26-2013, 09:43 AM   #2
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There should be a part number and manufacturer printed on the unit somewhere.
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Old 09-26-2013, 10:17 AM   #3
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Check this website..your part MAY be on there....Products
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Old 09-26-2013, 01:10 PM   #4
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Found it:
This part number has now been discontinued and replaced with #24213.
24123 had silver contacts; the replacement 24213 has superior silver tungsten carbide contacts, but is electrically identical.
200A, with silver contacts. Normally Open Contacts, spst, One circuit: Off - On
Housing: Plated steel
Studs: Copper 5/16" -24 thread, hexnuts and lockwashers included. Coil, ignition and ground terminals: Steel 10-32 thread, hexnuts and lockwashers included.
Bracket mounting holes 5/16" x 19/32" (7.9 x 15.1) on 2 13/64" centers (56.0mm).



WARNING
: Before you try to replace it, disconnect ALL batteries (frame and coach), not easy to unscrew the nuts.
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Nights camped in: 2014-96, 2015-139, 2016-89
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Old 10-11-2013, 12:41 AM   #5
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Any after effects from disconnecting the chassis battery?

Did you just pull the plug near the gas pedal and disconnect the house battery from its cables?
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Old 10-11-2013, 08:18 AM   #6
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Do what I say, don't say what I do !
I did not disconnect the chassis battery, I was afraid of the collateral effects !!!!
I just put electrical tape to avoid touching the negative.
You unmask me !
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Old 10-11-2013, 05:02 PM   #7
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Well I have been over at the sprinter forum researching procedures for disconnecting and reconnecting the chassis battery.

I did not find reference to any adverse affects except a possibility that the radio might have to be re authorized. Something about a code that has to be entered into the radio.

Just found the following info regarding the "battery master switch" located near the gas pedal.

http://www.lonestarsprinter.com/lone...ter_config.pdf

Details & Technology
The battery master switch breaks the ground connection between the the battery and the body and switches off all electrical consumers.
It is situated in the driver’s footwell, to the right of the accelerator pedal. The battery master switch is activated by disconnecting the
earth bolt connector.
It must be ensured that the battery master switch is only disconnected when the vehicle key in the ignition lock is in position 0,
otherwise there is a risk of damaging other components in the electrical system.
Benefits & Arguments
 Prevents uncontrolled discharging of the battery
 Work on the electrical system can be carried out more quickly
The battery master switch prevents uncontrolled discharging of the battery due to quiescent current consumption. It is recommended
for vehicles which are likely to be immobile for extended periods. The battery master switch also allows work on the electrical system to
be carried out more quickly, since it is not necessary to disconnect the battery pole.


this looks like the way to go if working on the ISO relay.

Am I missing anything?
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Old 10-11-2013, 05:46 PM   #8
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cousin01

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This procedure for battery disconnect is also explained in the Sprinter owner's manual. It works for me.
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Old 10-11-2013, 08:20 PM   #9
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I'm getting ready to put my Solera up for the winter so I made sure I could disconnect both batteries. I installed a ground disconnect switch for the house batteries so I made sure they were disconnected from the frame, I then pulled the chassis disconnect by the gas pedal. Everything was then dead so I am pretty sure I can put it in storage and find the batteries in good condition next spring.

The only thing I did was insert the key and leave it at position 0 before I reconnected the chassis battery as instructed in the manual.

Everything came back up OK, I didn't even have to re-initialize the windows as identified in the manual.
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Old 10-13-2013, 04:22 PM   #10
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Good to know. Thanks for the first hand report.
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