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Old 09-28-2013, 01:12 PM   #1
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Battery Boost Problems

I started up my RV just to let it run and thought I pushed the generator button but instead I pushed the battery boost. I immediately lost all kinds of electrical functions such as dash a/c radio etc. The house battery now won't flip on even. I have gone through the fuse panel and all the functions I mentioned have a fuse intact. I wish those two switches weren't next to each other! So I guess I my question is, what the heck happened? Does anyone have any experience with this? I can't believe that the button is covered or come with a warning. I've been looking through the owners manual but I have nothing. It's an 05 HR.
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Old 09-28-2013, 02:17 PM   #2
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Usually the Battery Boost solenoid is activated in one of two ways
One by pressing the switch and
Two by a wire from the RUN terminal on the ignition switch.
I don't see how trying to activate an already activated solenoid could cause your problem.
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Old 09-28-2013, 02:44 PM   #3
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Sounds to me that you had a dead house battery and when you push the aux start switch the rush of current from the engine battery blew a fuse between the battery and aux functions it normally feeds. This can be a fuse link up near the battery. It is fairly sizable in the 50 amp range. It probably is not mentioned in the manual for it seldom is a problem and the root cause needs to be fixed so the manufacturer does not want an owner without a volt meter to be messing with it.
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Old 09-28-2013, 03:44 PM   #4
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If you have a BCC you might have tripped a DC circuit breaker.
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Old 09-28-2013, 07:32 PM   #5
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Yeah I think I have a big problem now! I can't even get the generator to fire up anymore. What would be the first thing to blow?
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Old 09-28-2013, 09:23 PM   #6
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What is your voltages at the batteries, chassis and house. Cannot help without some info. Did you find the fuse near the chassis battery?
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Old 09-30-2013, 03:55 PM   #7
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I'm off tomorrow and I will start at the batteries and work my way back
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Old 09-30-2013, 04:15 PM   #8
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You might check the chassis battery switch circuit also. If that relay got fried somehow that would cause the same problem. If you have a rotary switch that would be different. Also, a poor ground would give this same condition.
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Old 10-09-2013, 10:18 AM   #9
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Well I finally got a day off to check the chassis battery and it read 12.8 rechecked the internal and external fuse box and found no problems there. So I went past the battery switch to the huge fuse box on the side and found that fuses 12 through 25 would not light but they were not blown either. Could this be the relays?
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Old 10-10-2013, 06:04 AM   #10
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Now we need specifics. What is your coach make, model and year. Must look at the wiring diagram to see what is up.
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