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Old 03-21-2014, 03:32 PM   #1
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Coach batteries won't charge when driving

I have a 2000 Coachmen Santara. Coach batteries stopped charging when driving. I check all fuses and wires for loose connections. All ok... Does anyone know what the problem could be? Also I have a question concerning emergency start switch.When holding switch while driving coach batteries charge.
Question is: If I install a toggle switch connected to e/ switch and use it to charge coach battiers, will this hurt any other equipment?

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Old 03-21-2014, 03:45 PM   #2
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JM... in your photo....you have two solenoids displayed.... one of those I do believe is the one that passes back charge current to your coach batteries. See if you are getting any? I do not know the answer to question the direct question about the toggle switch.
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Old 03-21-2014, 03:50 PM   #3
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There's a good chance you alternator has died. Alternators often get hurt when your coach batteries are down a bit and the starting battery also gets low. The alternator tries to bring everything up at once and in doing so, fails. If your starting battery is up often the alternators reference from the starting battery voltage and pace themselves at a lower output, even with somewhat discharged house batteries.
So this has been my experience -- so You can go into a battery exchange places, they can hook on to your rig's alternator circuit and tell you in a minute or so if I'm right.
Hope this helps

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Old 03-21-2014, 06:49 PM   #4
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Hold on here folks....

The fact that holding the aux start switch ON, allows the batteries to charge, proves the alternator is fine......

Closing the solenoid by using the aux start switch (or a newly installed switch) WILL NOT cause any harm to anything. Just remember to release it when the engine is OFF so it can isolate the house and chassis batteries.

Now, let's try to solve the original problem in WHY the batteries are not charging as designed.

I think your coach uses a model of the BCC (Battery Control Center) made by either Intellitec or RV-Custom Products. If you can identify it I can provide diagrams and procedures for trouble shooting it.
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Old 03-21-2014, 09:09 PM   #5
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With reference to your solenoid , holding it in or installing a switch I would verify it is a continuous duty solenoid.
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Old 03-21-2014, 09:45 PM   #6
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Quote:
Originally Posted by loulong View Post
Hold on here folks....

The fact that holding the aux start switch ON, allows the batteries to charge, proves the alternator is fine......

Closing the solenoid by using the aux start switch (or a newly installed switch) WILL NOT cause any harm to anything. Just remember to release it when the engine is OFF so it can isolate the house and chassis batteries.

Now, let's try to solve the original problem in WHY the batteries are not charging as designed.

I think your coach uses a model of the BCC (Battery Control Center) made by either Intellitec or RV-Custom Products. If you can identify it I can provide diagrams and procedures for trouble shooting it.
Thanks for the help and information. I can't identify what system I have. Maybe you could by looking a the picture.

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Left side is for coach right side chassis and the lower middle I think maybe is the isolated relay thats connects coach and chassis together?
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Old 03-21-2014, 09:47 PM   #7
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Not to worry, the solenoid IS a continuous duty solenoid, because that's how the system is designed to charge the house batteries from the alternator.

You just have to figure out why it's not closing when it should.
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Old 03-21-2014, 09:54 PM   #8
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Thanks for the help and information. I can't identify what system I have. Maybe you could by looking a the picture.
It doesn't appear to be either, but you should be able to trace the wires on the small terminals of that center silver solenoid. One should go to the dash aux start switch and another goes to the mystery source that closes the solenoid for charging. That source may be labeled IRD by Intellitec, or maybe just a feed from the chassis battery. Maybe through one of those DC circuit breakers along the top.
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Old 03-22-2014, 09:57 AM   #9
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You may want to post your problem here Forest River Owners Forum - iRV2 Forums there are others there with your same model.

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Old 03-22-2014, 10:54 AM   #10
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Looking at the picture closer and enlarging it. It's hard to tell, it looks like the small yellow wire at the rear next to the buss bar is broken. If it is broken, it may or may not have any connection to your problem, try to trace where it goes/comes from. On your disconnect solenoid it has two fuses, one on each side. Check of they are good, trace the two small wire from the fuses to see if they go to you interconnect solenoid. I believe that your disconnect solenoid, the black one in front of the picture is made by Intellitec. If it is you may have a BCC made by them. The attached file is for National RV, however it discusses both the Intelletec and RV Custom Products so it may help identify your BBC.

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Old 03-22-2014, 12:26 PM   #11
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Originally Posted by chboone View Post
Looking at the picture closer and enlarging it. It's hard to tell, it looks like the small yellow wire at the rear next to the buss bar is broken. If it is broken, it may or may not have any connection to your problem, try to trace where it goes/comes from. On your disconnect solenoid it has two fuses, one on each side. Check of they are good, trace the two small wire from the fuses to see if they go to you interconnect solenoid. I believe that your disconnect solenoid, the black one in front of the picture is made by Intellitec. If it is you may have a BCC made by them. The attached file is for National RV, however it discusses both the Intelletec and RV Custom Products so it may help identify your BBC.Chuck
Even with a RV-CP designed BCC there may be additional components built by Intellitec to do the sensing of voltages to activate the isolator/cross charge/aux start solenoid. They may be incorporated in the board or they may be identified by the terms IRD or BIRD.

The small fuses on the "Disconnect" solenoids have nothing to do with the "Interconnect" (isolator) solenoid. One fuse wire goes to the disconnect switch indicator LED and the other goes to power the disconnect switch.
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Old 03-22-2014, 01:35 PM   #12
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Wasn't sure what the fuses are for. My disconnect doesn't have any they are on the RV-CP BBC. If you look at the file I posted and the drawing for 111979 board it shows an Intelletec module that has logic for the interconnect relay cross charging and emergency start function. I realize since the drawing is for a National RV that the OP's maybe different. It would be best if he could find someone with the same coach as his that has a wire diagram.

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Old 03-22-2014, 04:45 PM   #13
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Originally Posted by chboone View Post
Wasn't sure what the fuses are for. My disconnect doesn't have any they are on the RV-CP BBC. If you look at the file I posted and the drawing for 111979 board it shows an Intelletec module that has logic for the interconnect relay cross charging and emergency start function. I realize since the drawing is for a National RV that the OP's maybe different. It would be best if he could find someone with the same coach as his that has a wire diagram. Chuck
I agree that finding someone with the same rig, who is knowledgeable on the problem area is always a plus.

BTW - I downloaded your drawings and added them to my growing pile of "little known and seldom used information" Thanks. That kind of stuff always seems to come in handy.
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Old 03-22-2014, 05:37 PM   #14
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I notice two of the circuit breakers have resets on them, did you try reseting them. Check to see if there is an inline fuse going to the silver solenoid in the center that connects to an ignition terminal at the ignition switch.
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