Thor 28 Z Chateau, House battery's go dead

jjbrtna@santel.net

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Mitchell
My house battery's go dead in about a week after sitting and do not charge while chassis is running found relay in left hand corner of engine compartment and it seems to be working voltage on one side when chassis is shut off and 13.7-14 volts when chassis is running, but at house battery's only have 12 volts when chassis is running. Does anyone have a wiring diagram or trouble shooting guide for this unit.
 
The 13.7+ volts you are measuring is the alternator’s output voltage. The house battery being 12 volts indicates that the BIM/BIRD/IRD is not connecting the two batteries.

The solenoid often fails in the BIRD/IRD and causes this. The BIM seems to be more robust.

David
 
My house battery's go dead in about a week after sitting and do not charge while chassis is running found relay in left hand corner of engine compartment and it seems to be working voltage on one side when chassis is shut off and 13.7-14 volts when chassis is running, but at house battery's only have 12 volts when chassis is running. Does anyone have a wiring diagram or trouble shooting guide for this unit.

Yes, located at the Thor Owners Resource Website.
 
Bird

we have a 22 Chateau 25M, E-350 chassis, I found our BIRD under the hood drivers side corner behind the coolant bottle, water would pour on it when it rains. Also Thor's drawing leave a lot to be desired.
 
Does anyone have a wiring diagram or trouble shooting guide for this unit.
For detailed wiring schematics and troubleshooting guides for the IRD and BIRD (whichever your coach is equipped with) visit the Intellitec website <https://intellitec.com/>.

Some time ago I created an enhanced wiring diagram by color coding and annotating the coach-specific diagram available on Thor's website, supplemented with additional information available on Intellitec's website. I did this in order to help me better understand and visualize the 12 volt wiring on my coach and to assist me with diagnosing my own charging problem, which turned out to be a failed isolator solenoid (Trombetta). My annotated diagram is included with this post, but because I don't know whether you have an IRD (Isolator Relay Delay, which is what my coach has) or a BIRD (Bi-Directional Isolator Relay Delay) it may not accurately reflect your implementation. However, because it may help others with similar issues who do have an IRD and find this thread by searching this website, I decided to include it here anyway.
 

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My house battery's go dead in about a week after sitting
In addition to your coach's failure to charge the house batteries when its engine is running, you may have a second problem. If you're not using lights or anything else that uses the power provided by the coach batteries when the coach is sitting, those batteries should not go dead in the span of a single week unless they are already at death's door, which is to be expected if they have been repeatedly deeply discharged or if they're just plain old. However, if the coach batteries are relatively healthy and you're not using any lights or other 12 volt powered equipment during that interval, something is draining them and you need to determine what is causing that drain.
 

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