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2003 Executive Battery Management


Grampy OG
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Just when I thought I had a good understanding of the "Big Boy" and the "BIRD" controllers I decided to cross reference with my right rear run bay/box. Well heck, I don't appear to have either one of those management  products.  Do any of you have an understanding of the components that are making up my battery management. I do believe that one of the components interfaces with my one and only solar panel. 

My reason for understanding all of this is that I do not believe that my house batteries are charging properly while driving down the road with only the alternator supplying current. I am also suspect that they are not charging properly with the generator. 

At times it seems that the chassis batteries are not charging properly with shore power connected. 

I understand that with all of our coaches there is a switching system but when I went on the hunt for the BigBoy and Bird I found this. 

Thanks for any input that you all may have,

Ken

 

 

 

runBay1.jpg

runBay2.jpg

runBay3.jpg

runBay4.jpg

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You have one similar to my 2001 Dynasty, here is some info that my be useful. Let  me know if you have any questions. The image labeled IMG_1252" is not from my coach but may be useful.

 

Bill

 

IMG_1253.JPG

12 Electrical Diagram in Rear Eng Compartment.jpg

IMG_1252.JPG

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On your battery maintainer (green on right side of picture) you should have a green light on when your generator is running or plugged in. Is it?

 

Tim

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On 3/29/2021 at 8:46 AM, Grampy OG said:

Just when I thought I had a good understanding of the "Big Boy" and the "BIRD" controllers I decided to cross reference with my right rear run bay/box. Well heck, I don't appear to have either one of those management  products.  Do any of you have an understanding of the components that are making up my battery management. I do believe that one of the components interfaces with my one and only solar panel. 

My reason for understanding all of this is that I do not believe that my house batteries are charging properly while driving down the road with only the alternator supplying current. I am also suspect that they are not charging properly with the generator. 

At times it seems that the chassis batteries are not charging properly with shore power connected. 

I understand that with all of our coaches there is a switching system but when I went on the hunt for the BigBoy and Bird I found this. 

Thanks for any input that you all may have,

Ken

runBay4.jpg

The big 200a Dual Battery Isolator on the left feeds alternator current to both chassis and house batteries when the chassis side is charging (engine is running). This one is pretty straightforward. When you have elevated voltage coming from the alternator (middle terminal), you should see the voltage on the other two terminals.

The smaller Lambert isolator on the right feeds charger/solar current to both house and chassis batteries when the house batteries are being charged. This one is not quite as straightforward as it looks... those diagrams posted above show the Chassis terminal on the right as being connected to that circuit breaker up above the big relay, but it's not actually like the drawing... On the top circuit breaker, the gray wire crimped to the 10ga red wire is a fusible link. From there, the red wire goes into the wire loom, crosses over to the other run box on the left side of the engine bay, through another relay in that box, back into the wire loom and back over to the battery isolator's right-side terminal.

The big solenoid in the middle just combines the the chassis batteries (top terminal) with the house batteries (bottom terminal) only when you press the Battery Boost switch on the dash.

Cheers,

Walter.

Edited by wamcneil
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On 3/30/2021 at 8:32 AM, wamcneil said:

The big 200a Dual Battery Isolator on the left feeds alternator current to both chassis and house batteries when the chassis side is charging (engine is running). This one is pretty straightforward. When you have elevated voltage coming from the alternator (middle terminal), you should see the voltage on the other two terminals.

The smaller Lambert isolator on the right feeds charger/solar current to both house and chassis batteries when the house batteries are being charged. This one is not quite as straightforward as it looks... those diagrams posted above show the Chassis terminal on the right as being connected to that circuit breaker up above the big relay, but it's not actually like the drawing... On the top circuit breaker, the gray wire crimped to the 10ga red wire is a fusible link. From there, the red wire goes into the wire loom, crosses over to the other run box on the left side of the engine bay, through another relay in that box, back into the wire loom and back over to the battery isolator's right-side terminal.

The big solenoid in the middle just combines the the chassis batteries (top terminal) with the house batteries (bottom terminal) only when you press the Battery Boost switch on the dash.

Cheers,

Walter.

Thank you Walter you closed the gaps for me. 

On 3/29/2021 at 10:49 AM, Timaz996 said:

On your battery maintainer (green on right side of picture) you should have a green light on when your generator is running or plugged in. Is it?

 

Tim

Hi Tim,

The led does not light. I found an old manual online for trouble shooting the battery maintainer so I will follow the steps to check it with the VOM and if it is indeed bad I will replace it. The part is no longer made but I think any similar battery maintainer will work. I suspect this is why my chassis batteries are dipping down over time.  I will attach the PDF incase any other members may have an interest. 

 

LAMBERT Battery Maintainer LE-415.pdf

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