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Old 04-17-2016, 04:34 PM   #11
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Automotive batteries don't normally have the CCA's needed to turn those big flywheels. Also, you can burn up your alternator that way as well.

Clicks mean dead batteries, or bad connections. I would try removing all wires 1 at a time and cleaning and re attaching them. Coat the ends on the terminals with some petroleum jelly for corrosive resistance.

If none of that works,

100 Amp 6/12V Battery Load Tester

Go get one of these and test your battery(ies)
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Old 04-17-2016, 06:15 PM   #12
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Thanks Docsgsxr... I was in the final stages of installing a battery isolator between the bus starting battery and the solar battery array (eight 6V batteries, connected to form 12V battery array of ~840Ah).

This morning when I had the starting issue, the battery isolator was not installed. The battery isolator is installed, and when I do the override, which connect the solar battery array to the bus starting battery, the bus starts right up.

But, when I disconnect the override, the bus dies immediately. I would have figured that even if the bus had dead battery, the alternator would be enough to keep the bus running, right? What do you think is my issue? Thx!
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Old 04-17-2016, 06:21 PM   #13
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What Doc said.

Yeah, when using your car to start another vehicle leave the ignition turned off and jump the other vehicle using just the battery power. Not only can you damage your alternator the way you're using it, but you can also do a royal job on the computer in your car. That's really hard on a car alternator to do that. I usually estimate they are good for about 4 to 10 jump starts before going bad.

I hate to say it but if your battery terminals are already clean, check your ground wire to the frame. Disconnect it and use some sandpaper to clean the contact area on the frame and on the terminal end, bolt it back on tightly then smear some grease on it.

But then since we're far away it's kind of hard to judge. If your battery is good, it's got to be a connection. They get corroded on older vehicles.
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Old 04-17-2016, 06:22 PM   #14
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It sounds like an electric fuel pump is probably cutting out and starving the engine when you disconnect the solar array.
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Old 04-17-2016, 07:08 PM   #15
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Quote:
Originally Posted by engelstad View Post
Thanks Docsgsxr... I was in the final stages of installing a battery isolator between the bus starting battery and the solar battery array (eight 6V batteries, connected to form 12V battery array of ~840Ah).

This morning when I had the starting issue, the battery isolator was not installed. The battery isolator is installed, and when I do the override, which connect the solar battery array to the bus starting battery, the bus starts right up.

But, when I disconnect the override, the bus dies immediately. I would have figured that even if the bus had dead battery, the alternator would be enough to keep the bus running, right? What do you think is my issue? Thx!
So let me get this straight, when the coach batteries are connected to the start batteries it starts and runs, engage the isolator and it dies?? Sounds like you have bad starting battery issues my friend.
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Old 04-17-2016, 07:24 PM   #16
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Engelstad, check your pm's.
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