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 Post subject: School bus batteries?????
PostPosted: Sun Oct 18, 2009 8:11 pm 
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Does anyone know anything about school bus battery/voltage system. We have an older bus at our church and I am researching some type of trickle charge system cause batteries always seem to be dead when we need to use it. Anyway, I know it has two larger batteries, but my research is leading to different voltage systems. Anyone know how to tell what I have or has any experience with them? Not sure of bus brand, I can find out though.

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PostPosted: Sun Oct 18, 2009 8:17 pm 
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Ask John :wink:

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PostPosted: Sun Oct 18, 2009 8:20 pm 
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Is there something that is possibly draining them? Buddy had an old bus that always had a dead battery when we wanted to go out drinking in it. you know ROAD TRIP!! :wink:
Anyways we installed a cut off on the main line, problem solved. It just cut the batteries off from the main circuit.

Just a thought

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PostPosted: Mon Oct 19, 2009 4:58 am 
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100% go with toms suggestion

those old buses (expecially bluebirds) always have grounding issues with the wiring to several things

the rear doors with the buzzer commonly broke after 5-10 years and the buzzer was removed or the wires were cut however those buzzers get power with the key off and were a common drain

they often ended up with 2 different age/brand/amp batterys too which will always cause problems with dual battery vehicles


if you're going the initial economical route, start with the cut off switch

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PostPosted: Mon Oct 19, 2009 5:57 pm 
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We had talked about a cut off switch initially, I was supposed to install one last spring. I figured though since it only get ran every 3-4 months, a trickle charger would be better. Guess I will do that first.
Any recommendations on what amperage/voltage size cutoff we need???


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 Post subject: Don't want to sound Greenie Wienie
PostPosted: Wed Oct 21, 2009 7:11 am 
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But a solar powered battery charger works great. I used one in my old Jetta that I parked at the Airport, kept the battery charged up. Then when I sold the Jetta, I put it into the old VW Diesel camper and it kept the battery charged up and in good shape. I used the big one from Harbor Freight.

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PostPosted: Mon Oct 26, 2009 11:19 pm 
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if you have a amp meter you could make sure the bus is off and put it in line with the battery, that will tell you if you have an amp draw somewhere, if you do then hook the battery back up and do the same thing with the fuse block. pull a fuse and one lead to the battery side of the fuse and one to the load side of the fuse until you find draw. I thought buses had a night switch, one big power disconnect. happy hunting.

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PostPosted: Tue Oct 27, 2009 5:24 am 
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Normally I'd be a solar trickle charger proponent, but with dual batteries, the setup is a problem, or else you have to get a more fauncy high priced setup to keep the thing from cooking the batteries.
I'd start with a cutoff switch, and then you can look at Solargizer Battery Conditioner setups. I've been using the Solargizers on my two Jeeps for quite some time now, and they do work.
When the TJ goes over to dual battery (I have the tray, just not the wherewithall) then things get difficult.

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 Post subject: Re: School bus batteries?????
PostPosted: Sat May 23, 2020 3:04 am 
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For this purpose I suggest having a consultation with an expert mechanic or engineer. And you can get the best essay writing services from australian assignment writers. They will guide you better than that youtube is also a good way to get information. And hope that the experts will also answer your question on thsi blog. Have patience.


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