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Old 07-08-2022, 09:59 PM   #1
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Battery question

Now that I gotten a recall completed BBC 1250; on 2007 Magellan, A NEW alternator my coach will start and run for for a while but when it I switch it off iit won’t restart. Is there anyone that have any ideas.

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Old 07-09-2022, 12:21 AM   #2
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I would clean the battery terminals, then with the engine running check the voltage it should be in the 14 volt range. If it's not that high maybe the new alternator is bad or the wiring
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Old 07-09-2022, 02:40 PM   #3
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My first question was, is it turning over at all and just won't start? Does it make a clicking noise or just nothing at all.

If there is nothing at all then I would first check to see how much of a charge that the batteries have, there should be at least 13.2 volts. If this is too low then I would charge the battery to where it should be, then start the engine and measure the volts at the battery again, this will tell you what the alternator is putting out. Should be at or near 14, although 13.8 would be good too. If this is too low then the alternator is bad. If all else is good then I would get the battery tested to ensure that it has enough cold cranking power to start the engine. When a starter is HOT it takes more AMPs to crank the engine.

Also check all of the starting system connections including the engine ground. After ensuring the battery terminal are clean and tight, check the positive connection to the starter.

Turns but no start would indicate to me that there is nothing wrong with the batteries as there is enough power to turn the motor over. This is a much larger problem with these newer engines.
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Old 07-13-2022, 10:09 PM   #4
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After I did the jumper fix it starts but the relay is Hot in the BCC. ??????
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Old 07-13-2022, 10:13 PM   #5
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Performed the BCC jumper fix. lost things such as windshield fans, radio,blower motor and leveling jacks. Relay in BCC is heated/hot ????
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Old 07-13-2022, 10:15 PM   #6
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Did as you suggested and Performed the BCC jumper fix. lost things such as windshield fans, radio,blower motor and leveling jacks. Relay in BCC is heated/hot ????
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Old 07-13-2022, 11:18 PM   #7
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So you took both positive cables off the switch and put them together and put a bolt through them, wrapped them with tape so they wouldn't short out. The relay still gets hot, I could see if the cables were left on and one was loose causing it to get hot because of a bad connection. Check your main fuses in the rv and for the truck area up front
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Old 07-14-2022, 04:08 PM   #8
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Bcc

No what I did placed a jumper cable onto chassis battery and chassis switch. I lost power A/C, windshield fan, radio and leveling jacks
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Old 07-14-2022, 06:00 PM   #9
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Originally Posted by Rookierv View Post
No what I did placed a jumper cable onto chassis battery and chassis switch. I lost power A/C, windshield fan, radio and leveling jacks
Sounds like you tripped a breaker, but you have something else going on

What do your voltage readings show across the various systems?
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Old 07-14-2022, 06:11 PM   #10
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Originally Posted by lwmcguir View Post
Sounds like you tripped a breaker, but you have something else going on

What do your voltage readings show across the various systems?
Meter readings are 13.8 on chassis battery, and 13.8 on House battery.
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Old 07-14-2022, 06:52 PM   #11
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Did you check the big circuit breaker by the batteries
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Old 07-14-2022, 09:28 PM   #12
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Yes, did a Ohms test and the test was positive. oh by the way my circuit breake does not have the little reset button. house Battery voltage reading 13.8, Chassis Bat at 13.9
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Old 07-14-2022, 10:35 PM   #13
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Originally Posted by Rookierv View Post
Now that I gotten a recall completed BBC 1250; on 2007 Magellan, A NEW alternator my coach will start and run for for a while but when it I switch it off iit won’t restart. Is there anyone that have any ideas.
What is a BCC 1250?
What model of BCC do you have so we can look at the diagram.
https://rvcustomproducts.com/rv-custom-products-home
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Old 07-14-2022, 10:44 PM   #14
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Originally Posted by Rookierv View Post
Did as you suggested and Performed the BCC jumper fix. lost things such as windshield fans, radio,blower motor and leveling jacks. Relay in BCC is heated/hot ????
Which relay in the BCC, there are a multitude of them. You work for the CIA by any chance as you are VERY cheap with any information.
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