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Old 04-21-2013, 10:20 AM   #1
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Electrical problem

2011 DSDP, 300 cat, freightliner chassis. Well we have made our first trip, 1400 miles from Ky to New Mexico. Everything was good when we left but at our first fuel stop, I shut the engine off, opened the door and the steps would barely move out, sort of starting and stopping. In the control panel above the windshield, the light on the battery disconnect was blinking bright and then dim. I pushed the button on that panel to check voltage and it was jumping around from 2 volts, 4 volts, 12 volts at random. The refrigerator panel was blinking bright and dim. After about 2 minutes everything quit and nothing would work, all lights went out. After refueling I started the engine and after about 1 minute the battery disconnect light came back on and everything worked as normal. If the engine is shut down then it happens again. We arrived at the rv park here in Quemado, NM and plugged into shore power and everything resumes to normal like it did when I started the engine. What and where do I start looking at?????
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Old 04-21-2013, 10:23 AM   #2
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Sounds like the connections on the batteries need a good cleaning. Clean all of them and see if that helps.



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Old 04-21-2013, 10:32 AM   #3
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Dunner that's where I'd start. Take a photo of your cable set up and label each cable to be sure to reinstall properly. If cleaning all connections doesn't solve it, it could be a bad contact in your battery disconnect relay.
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Old 04-21-2013, 10:37 AM   #4
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I will assume you have your battery disconnect switch is on and always on when ever you are using your coach.
https://encrypted-tbn2.gstatic.com/i...YLOsygtum8jpy2
Your Bird System will keep all your batteries charged while on shore power and from your engine alternator while traveling but the BDS has to always be on or the house batteries will eventually go dead.
Also as Dunner has said maintenance has been done prior to trip for all battery connections both positive and negative cable on chassis frame good and clean.
While your shore power cable is now plugged in everything is now working off converter 12 volts but if the BDS is still off the converter can still not charge your house batteries or chassis batteries thru the BIRD SYSTEM..--------Newmar 12v battery system

If your camping for the weekend or longer your batteries may recover but the BDS needs to be on.
A good battery 12V charger would bring up the batteries quicker.
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Old 05-02-2013, 08:42 PM   #5
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Cleaned the battery terminals and still doing the same thing. As soon as I unplug from shore power or shut down the engine the lights on the refrig and on the on/off switch in the panel above the passenger start pulsating from dim to bright. When I open the door the steps start out and then they start pulsating trying to go out but don't make it. The voltage meter in the panel shows the voltage going up to 12-13 then down to 2-4 volts and keeps jumping up and down. Any ideas???? It started doing this just out of the blue, everything was working fine and then all of a sudden this happened and has not worked right since the first time it did it.
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Old 05-02-2013, 09:21 PM   #6
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Did you clean the battery cables attached to the chassis frame?
Chassis frame is your negative return to your house batteries.
Steps are usually off your chassis batteries but there negative battery cable maybe doubled up with the house batteries.
Was there any work done before this problem started?
You have a high resistance open trying to complete the return to your batteries and negative is common to them all.
If you look at the Bird wiring diagram you will see the connections to solenoids may have a loose battery connection on one.
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Old 05-02-2013, 09:28 PM   #7
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Pulsing sound like the converter or inverter is acting up. Starts to provide the required voltage, then shuts down. Tap on it and see if anything changes.



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Old 05-02-2013, 09:32 PM   #8
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Agree with 007, it sounds like a flakey ground on the house battery side, hooked up to shore power, 12v thru the converter/charger. Diesel running ,after couple min. 12v from alternator goes to house batteries too. Voltage gauge jumping around really sounds like poor ground connection. From an old Navy ET, who has been carrying a Fluke in my tool bag for the last 45 yrs.
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Old 05-02-2013, 09:38 PM   #9
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Will follow down the ground to the frame and check it tomorrow. Thanks, everyone, will let you know if that works.
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Old 05-09-2013, 11:10 PM   #10
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Just finished the same problem with a friends RV. Was a bad fuse right before the batteries. Had 13.77 going in and only 8.2 volts coming out. He had a 300A fuse for his RV.
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