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Old 03-02-2013, 08:28 AM   #1
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BIRD

Should I have a wire connected to the coach batt terminal on this bird system? Also, the way it is connected what should be charging what?



Does the bird charge the coach batteries while the engine is running with it connected this way. If I connect a wire from the coach batteries to this terminal will the converter charge the chassis batteries while plugged in? I guess I don't quite understand how this is suppose to work.

Thanks,
Brian
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Old 03-02-2013, 09:57 AM   #2
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It looks as if you will have coach batteries charging while running due to the ignition sense wire. However, without the coach battery wire your device will not sense the coach batteries being charged by shoreline or generator and will not charge the engine batteries.

The large solenoid below the device is the combining relay. Be aware they can get hot to the touch. You can add a jumper right to the large terminal associated with the coach batteries.

Before doing this you should determine if your solenoid is working correctly. Even if it is clunking when powered the internal contacts are a know failure item. If you do a search for Bird etc you will find pages of stuff. I have a dozen diagrams and notes on the various setups. To determine if it is working correctly check your engine battery voltage and coach battery voltage with the engine off and no shoreline. Now start the rv and do the same measurement. If the voltages are exactly the same you are good to go. If you see 1/2 of a volt difference across the two heavy terminals then the solenoid is sick.

Or connect shoreline, measure the batteries again. If you see a difference the solenoid is probably not activated and you can activate it with a light jumper from one of the small terminals to either of the large ones. You should be able to identify which small terminal is ground and which is the input control. If you short from the ground to the large posts thing will get exciting fast. Don't do it. When you do activate the solenoid with the jumper it might startle you with a large clunk sounds. If your fingers are on the bare end of the jumper wire you may get a harmless jolt. No worries, it will only make you jump.
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Old 03-02-2013, 10:09 AM   #3
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I'm noticing a voltage difference between the coach and house batteries when the engine is running, I'll check my coach battery isolator
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Old 03-02-2013, 03:11 PM   #4
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Thanks YC1. I jumped from the coach battery to the coil of the solenoid and it clicked. My chassis battery voltage jumped from 12.6 to 13.2 so it was getting a charge from the converter. I will need to pick up a couple of terminals and connect from the coach side of the solenoid to the coach terminal on the bird. I think thats all it will take. Thanks...
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Old 03-03-2013, 09:39 AM   #5
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Quote:
Originally Posted by Homey55 View Post
Thanks YC1. I jumped from the coach battery to the coil of the solenoid and it clicked. My chassis battery voltage jumped from 12.6 to 13.2 so it was getting a charge from the converter. I will need to pick up a couple of terminals and connect from the coach side of the solenoid to the coach terminal on the bird. I think thats all it will take. Thanks...
Excellent. Just a reminder that the solenoid will get HOT to the touch when on shoreline for many hours but this is normal. Strange the wire is not there already. Once you are connected it can take a couple of minutes for the BIRD to engage the solenoid so don't expect and instant activation. As for the solenoid keep in mind they do fail and in a few months if you have an engine battery not getting charged just start over testing the solenoid. I keep a spare because I have overhauled mine three times in 5 years.
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